Pith. sign in

REVIEW 2 major objections 5 minor 1 cited by

Odyssey of the elusive $\Theta^+$

T0 review · 2 major / 5 minor · reviewed 2026-08-12 · deepseek-v4-flash

Challenge this review Re-run · record.json Download PDF Read on arXiv ↗ Review JSON

Pith's one-line read A cancellation in the decay operator makes the $\Theta^+$ pentaquark width naturally small.

desk verdict A readable insider review of the Theta+ saga with a clear width-cancellation argument, slightly overclaimed because the chiral-breaking corrections are not quantified. read the letter →

arxiv 2411.08429 v1 pith:ZBW4VG57 submitted 2024-11-13 hep-ph

Michal Praszalowicz This is my paper · ORCID
classification hep-ph
keywords Theta+pentaquarkchiralsolitonmodelexoticbaryonantidecupletdecaywidthoperatorcancellationstrangeness+1resonancekaon-nucleonformationGoldberger-Treimanrelation
verification ladder T0 review T1 audit T2 compute T3 formal

The pith

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The reading

This review argues that the $\Theta^+$ pentaquark --- a putative positive-parity state with quark content $uudd\bar{s}$ and mass near 1540 MeV --- is not excluded by the null results that removed it from the standard listings. The central theoretical claim is that chiral soliton models produce an antidecuplet decay operator whose leading and subleading terms cancel, so the $\Theta^+$ width is naturally below about 0.5 MeV rather than the roughly 100 MeV that naive quark-model estimates suggest. On that basis the review reassesses the experimental record, finding that most non-observation experiments only bound the production cross-section and that the decisive test is a kaon-nucleon formation experiment. A sympathetic reader would care because the same cancellation explains how such a state could have stayed invisible for two decades, and dedicated kaon-beam formation searches planned for the near future can settle the question.

What carries the argument

The load-bearing object is the collective decay operator of the rotating chiral soliton, truncated to three couplings $G_0$, $G_1$, $G_2$ and related to the axial constants $a_0$, $a_1$, $a_2$ through the Goldberger-Treiman relation. This operator converts the spin-flavor structure of the soliton into a prediction for the antidecuplet decay constant $G_{\overline{10}\to 8}$; the cancellation between the leading and subleading terms is what makes the $\Theta^+$ narrow. The nonrelativistic quark-model limit of the same operator gives an exact zero for any $N_c$, showing that the cancellation is not tuned to three colors.

What would settle it

A kaon-nucleon scattering experiment with energy resolution below about 1 MeV that scans the 1.52--1.56 GeV mass region and finds no narrow Breit-Wigner resonance would falsify the existence claim as formulated; alternatively, a lattice calculation of the $\Theta^+ \to KN$ coupling that gives $|g_{\Theta N K}|$ much larger than roughly 0.2 would falsify the cancellation mechanism while leaving the existence question open.

Watch

Extended reading notes

Core claim

The paper's central claim is that the small width of the $\Theta^+$ is a structural prediction of chiral soliton models, not a numerical accident. In the decay operator of the rotating soliton, the leading coupling $G_0 \sim N_c$ is accompanied by subleading rotational corrections $G_1$ and $G_2$; through the Goldberger-Treiman relation these couplings are fixed by the axial constants $a_0$, $a_1$, $a_2$ extracted from hyperon semileptonic decays. The antidecuplet-to-octet coupling is $G_{\overline{10}\to 8} = -a_0 + \frac{1}{2} a_1$, and in the nonrelativistic quark-model limit $a_0 \to -(N_c+2)$, $a_1 \to 4$ one finds $G_{\overline{10}\to 8}=0$ for any $N_c$. With the fitted value $a_0 = -3.51$ the coupling is only $-0.23$, which makes the width small independently of the prefactors in the width formula, and octet mixing can only suppress it further. The review concludes that the $\Theta^+$ width must be below about 0.5 MeV and that dedicated $KN$ formation experiments can test this directly.

Load-bearing premise

The small-width claim rests on the decay operator being adequately described by just three couplings; if the five additional chiral-symmetry-breaking terms not discussed in the review are numerically significant, the cancellation could be accidental rather than robust.

Editorial extensions

If this is right

  • If the width is below about 0.5 MeV, the many null searches that were sensitive only to widths of several MeV do not exclude the $\Theta^+$.
  • A $KN$ formation experiment should see a peak cross-section of roughly 15--20 mb, so even a modest-statistics run can reach a decisive signal.
  • Photoproduction carries sizable theory uncertainty from the photon-to-$K^+K^-$ dissociation vertex, while the formation channel avoids that uncertainty.
  • If the $\Theta^+$ exists, the rest of the antidecuplet is predicted with specific masses and widths, including a narrow $\Xi$ state in the range recently scanned without a confirmed signal.
  • The same cancellation structure has been used to interpret narrow excited $\Omega_c$ states as heavy pentaquarks of the exotic 15 multiplet.

Reading between the lines

Editorial extensions of the paper, not claims the author makes directly.

  • If the cancellation is robust, every positive-parity antidecuplet state in chiral soliton models should be narrow, which turns the single-state claim into a family-level prediction that can be checked across strangeness sectors.
  • A future high-resolution formation experiment that finds no peak near 1540 MeV would not by itself disprove the cancellation mechanism, because the state's mass could lie outside the scanned window; scanning a wider mass range would separate the two possibilities.
  • The same $G_{\overline{10}\to 8}$ cancellation suggests that the reason the $\Theta^+$ appears in some production channels and not others is the production mechanism rather than the resonance's existence, so null photoproduction results should be weighted accordingly.
  • A first-principles computation of the axial constants $a_0$, $a_1$, $a_2$ from lattice QCD would predict the width without any hyperon-decay fit and would test the cancellation claim directly.
Share X Bluesky LinkedIn Reddit HN

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, and a circularity audit.

Referee Report

2 major / 5 minor

Summary. The manuscript is a review of the theoretical and experimental history of the Θ+ pentaquark, centered on the chiral soliton model (the Skyrme model and the chiral quark-soliton model). It recalls the SU(3) collective quantization of the soliton, the mass splittings within the antidecuplet, and the structure of the baryon-meson decay operator. The central theoretical discussion is the small-width mechanism: the antidecuplet decay coupling G_{10bar→8} vanishes exactly in the nonrelativistic quark-model limit for any N_c (Eq. (53)) and remains numerically small for realistic axial couplings, leading the author to state that the width must be much smaller than 0.5 MeV. The review then surveys experimental evidence, emphasizing LEPS and DIANA results that remain positive, while also quoting the Belle upper limit and the CLAS null result, and argues that dedicated formation experiments at J-PARC and the JLab KL facility can settle the existence question. The overall conclusion is that the Θ+ story is not closed.

Significance. If the small-width mechanism is robust, the review provides a historically rich and useful synthesis of four decades of work on exotic baryons in chiral soliton models, and it sharpens a falsifiable experimental prediction: a narrow Θ+ with width below about 0.5 MeV should be observable in K+N formation, with a model-independent peak Breit-Wigner cross section of order 15–20 mb. The paper is transparent about much of its model dependence, quotes the Belle upper limit and the CLAS null result, and includes an exact limiting check (Eq. (53)) of the cancellation that is a genuine structural insight. Its principal weakness is that the quantitative smallness in the realistic case rests on a decay operator truncated to three couplings and on one quantization method, while the acknowledged chiral-breaking corrections and the bound-state critique are not quantified. The review is a valuable contribution to the memorial volume, but the robustness of its central width claim needs either strengthening or careful qualification.

major comments (2)
  1. [5.2, Eqs. (53)–(56)] The claim that 'the Θ+ decay width is small irrespectively of the prefactors entering Eq. (49)' is not fully established for the realistic soliton. The exact zero of G_{10bar→8} in Eq. (53) holds only in the NRQM limit; at the physical soliton size the cancellation is numerical, occurring near a0 = -3.55, within roughly 0.04 of the fitted value a0 = -3.51 of Ref. [98] that the text itself describes as strongly model-dependent. Immediately after this, the text states that chiral-symmetry-breaking corrections to O_phi introduce five new terms [72] that are not discussed; these are O(ms) corrections to the same operator in which G1 and G2 are already O(N_c^0) subleading terms. The text therefore does not rule out that the five omitted terms shift G_{10bar→8} substantially away from zero. Please provide, or cite, a quantitative estimate of the five terms and a sensitivity analysis of G_{10bar→8} to a0, or qualify the 'below 0.5 MeV' statement as a model-dependent expectation rather than a firm conclusion.
  2. [4.5 (footnote); 5.2] The collective-coordinate computation that underlies the small width is cited as criticized in Ref. [73] (Walliser and Weigel), but the content of that criticism is never discussed. If the bound-state quantization method gives a width of order tens of MeV, then the smallness found in the collective-coordinate approach may be a quantization artifact rather than a generic chiral-soliton prediction. This matters for the Summary's statement that dedicated formation experiments can settle the existence question, because the 'width below 0.5 MeV' expectation is the main theoretical motivation for those experiments. The review should summarize the bound-state result and explain why it does or does not apply to Θ+, or should explicitly state that the small-width prediction is method-dependent.
minor comments (5)
  1. [5.2, Eq. (54)] Please check the arithmetic leading to '-a0 + a1/2 = 5.21': inserting g_A^(3) = 1.25 and a2 = 0.48 into Eq. (48) gives approximately 5.32 for this combination, depending on rounding.
  2. [References] The bibliography contains a stray '[81]' line followed by a second entry also numbered '[81]' (Diakonov, arXiv:1003.2157); the numbering and the list should be repaired.
  3. [Throughout] There are several typos: Section 1 'reacher' should be 'richer'; Section 4.2 'Lagragians' should be 'Lagrangians'; Section 4.5 'Gudagnini' should be 'Guadagnini'; Fig. 5 caption 'corresponds ro r0' should be 'corresponds to r0'; Section 4.6 'representaion' should be 'representation'.
  4. [5.2, Eqs. (50) and (53); Fig. 6] In the plain-text rendering, the overline distinguishing the antidecuplet coupling G_{10bar→8} from the decuplet coupling G_{10→8} is visually lost, so both couplings appear identical in Eqs. (50) and (53); please ensure the typeset version clearly differentiates 10 and \overline{10}.
  5. [Abstract and Summary] The wording that positive evidence of Θ+ 'persists to this day' is stronger than the experimental picture presented in the body, where the positive results come from LEPS and DIANA while the dedicated CLAS search is null and Belle sets an upper limit; please make this asymmetry explicit in the abstract or Introduction.

Circularity Check

0 steps flagged · score 0.0 of 10

No significant circularity: the small-width cancellation is analytically derived and the realistic smallness is presented as an acknowledged model-dependent extrapolation, not as a fitted prediction.

full rationale

This is a review paper, and its central claim about the smallness of the Θ+ width does not reduce to its inputs by construction. The exact anti-decuplet decay constant zero is derived algebraically in Eqs. (50) and (51): in the nonrelativistic quark-model limit one has a0 = -(Nc+2), a1 = 4, a2 = 2, and Eq. (53) gives G10→8 = 0 for any Nc. This is an analytic consequence displayed in the paper itself, not an input fitted to Θ+ data. For the realistic soliton size, the paper uses a0 = -3.51 from hyperon semileptonic fits (Ref. [98]) and explicitly states that G10→8 = -0.23 follows, while also warning that this result is strongly model-dependent and subject to unknown systematic uncertainty. That is a parameter-driven extrapolation from unrelated semileptonic data, not a statistically forced prediction of the Θ+ width. The self-citations to Refs. [5, 72, 96, 99] supply the decay operator and axial-current derivations, but the load-bearing formulas are reproduced in the review, and no claim rests solely on an unverified self-citation. The acknowledged omission of five chiral-symmetry-breaking terms in the decay operator is a genuine completeness and robustness caveat, but it is not a circular reduction. Therefore the paper shows no significant circularity.

Assumptions & free parameters 5 free parameters · 4 assumptions · 0 invented entities

The review introduces no new particles, fields, or conserved quantities. Theta+ and N(1685) are prior proposals discussed by the paper. The central claims rest on fitted axial couplings, on the chiral soliton quantization framework, and on the arctan Ansatz, all carried over from the cited literature.

free parameters (5)
  • a0 (axial coupling) = -3.51 (from ref [98] fit to hyperon semileptonic decays)
    Controls the antidecuplet decay constant G10->8 = -a0 + a1/2 (Eq. (50)); the quoted small width relies on this fitted value and on the shaded NJL model band in Fig. 6.
  • a1 (axial coupling) = not independently fixed; linked to a0 via g_A^(3) = 1.25 in Eq. (54)
    Needed for G10->8 and G10->8; not separately constrained by nonexotic data, so the width prediction has a one-parameter freedom shown in Fig. 6.
  • a2 (axial coupling) = 0.48 from g_A^(0) = 0.24 in Eq. (54)
    Enters G10->8 = -a0 - (Nc+1)/4 a1 - a2/2; it is a fitted input.
  • Skyrme parameter e = about 4.45
    Chosen to reproduce the decuplet-octet splitting, then used to compute the antidecuplet-octet splitting Delta_10-8 ~ 600 MeV (Eqs. (45)-(46)); the Theta+ mass estimate depends on it.
  • strange moment of inertia I2 = not constrained by nonexotic data
    Sets the antidecuplet mass splitting (Eq. (43)); the review states explicitly that I2 cannot be determined from ordinary baryons and must come from model input.
assumptions (4)
  • domain assumption The large-Nc expansion and the hedgehog symmetry of the chiral soliton justify collective quantization and the SU(3) representation tower (Eqs. (28)-(33)).
    The entire baryon spectrum, including the antidecuplet, follows from this quantization scheme; the review takes it as the framework in Section 4.4.
  • domain assumption The decay operator of Eq. (39), truncated to three couplings G0, G1, G2 that scale as Nc and Nc^0, is sufficient for pentaquark widths.
    The small-width conclusion follows from this truncation; the review notes that additional ms-correction terms exist but are not discussed in Section 5.2.
  • ad hoc to paper The soliton profile can be represented by the arctan Ansatz P(r) = 2 arctan((r0/r)^2), and model integrals are evaluated with it.
    Used to compute soliton mass and moments of inertia in the Skyrme limit (Eqs. (22), (24), (45)); it is a variational choice, not derived from QCD.
  • ad hoc to paper The axial couplings a0, a1, a2 extracted from hyperon semileptonic decays (ref [98]) can be used in the chiral soliton model for exotic decays.
    The numerical smallness of G10->8 relies on this transfer of fitted couplings into the model's decay operator (Section 5.2, Eqs. (47)-(54)).

how reviews work

0 comments
Cite this review

Pith. "Pith review of Odyssey of the elusive $\Theta^+$." pith.science (2026). https://pith.science/paper/ZBW4VG57

@misc{pith2026241108429,
  author       = {Pith},
  title        = {Pith review of: Odyssey of the elusive $\Theta^+$},
  year         = {2026},
  howpublished = {\url{https://pith.science/paper/ZBW4VG57}},
  note         = {Machine review of arXiv:2411.08429}
}
abstract

$\Theta^+$ is a putative light pentaquark state of positive parity with minimal quark content $(uudd\bar{s})$. It naturally emerges in chiral models for baryons, but experimental evidence is uncertain. We review the theoretical foundations of chiral models and their phenomenological applications to exotic states. In particular, we discuss in detail the pentaquark widths with special emphasis on the cancellations occurring in the decay operator. We also discuss some experiments, mainly those whose positive evidence of ${\mit\Theta}^+$ persists to this day. This review is dedicated to Dmitry Diakonov, Victor Petrov, and Maxim Polyakov and their contribution to the ${\mit\Theta}^+$ story.

Figures

Figures reproduced from arXiv: 2411.08429 by the authors.

Figure 1
Figure 1. Number of pentaquark papers in arXiv per month in the first 21 months after the publication of LEPS and DIANA. At the top in red, experimental papers confirming pentaquark discovery, at the bottom in blue, no-observation experimen￾tal papers. The blue solid line is for eye-guiding [PITH_FULL_IMAGE:figures/full_fig_p003_1.png] view at source ↗
Figure 2
Figure 2. Pentaquark multiplets 10 (solid triangle) and 8 (dashed octagon) that follow from the quark model. This observation led Jaffe and Wilczek [29] to propose a diquark model for positive parity pentaquarks, where the physical states would correspond to pure quark states. This scenario was dubbed as an ideal mixing. Group theoretical considerations provide us with mass formulas with a number of free parameters that have … view at source ↗
Figure 3
Figure 3. In the χQSM, the soliton mass is given as a sum over the energies of the valence quarks and the sea quarks computed with respect to the vacuum and appropriately regularized (see e.g. [62]) Msol = Nc " Eval + X En<0  En − E (0) n  # . (23) [PITH_FULL_IMAGE:figures/full_fig_p013_3.png] view at source ↗
Figures from the paper (6 more)
Figure 3
Figure 3. Figure 3: Soliton profile function P(r) for r0 = 1/2 (short-dashed orange), r0 = 1 (solid blue), r0 = 2 (long-dashed green) in arbitrary units [PITH_FULL_IMAGE:figures/full_fig_p014_3.png]
Figure 4
Figure 4. Figure 4: Schematic illustration of the calculation of the soliton mass, which is the [PITH_FULL_IMAGE:figures/full_fig_p015_4.png]
Figure 5
Figure 5. Figure 5: Soliton energy (mass) in MeV for M = 345 MeV as a function of a di￾mensionless variational parameter Mr0: solid (blue) — total mass, short-dashed (orange) — energy of valence quarks, long-dashed (green) — sea contribution. Minimum of ∼ 1200 MeV corresponds ro r0 ≃ 0.5 …
Figure 6
Figure 6. Figure 6: Couplings G10→8 (upper long-dashed line), G10→8 (middle solid line), and H10→10 (lower short-dashrd line) as functions of a0. The shaded area corresponds to the NJL model range [72]. In any case, the message from this consideration is clear: the Θ+ decay width is small…
Figure 7
Figure 7. Figure 7: Takashi Nakano and Dmitry Diakonov holding a 0.5 cm thick plastic scin [PITH_FULL_IMAGE:figures/full_fig_p030_7.png]
Figure 8
Figure 8. Figure 8: Θ+ photoproduction at LEPS. Five years later, in 2008, LEPS published results from a dedicated photo-production experiment, this time on a deuteron target [18]. Al￾though the measurement strategy was basically the same as in the case of carbon, the deuteron setup offer…

Discussion (0). Continue with ORCID to comment.

Forward citations

Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Pentaquarks made of light quarks and their admixture to baryons

    hep-ph 2025-07 conditional novelty 6.0 of 10

    Light pentaquark wavefunctions are constructed from permutation symmetry, and a nucleon-pentaquark mixing model yields a five-quark Fock probability P5q of order 0.4.

Reference graph

Works this paper leans on

134 extracted references · 37 canonical work pages · cited by 1 Pith paper

  1. [73]

    Bound state versus collective coordinate approaches in chiral soliton models and the width of the Theta+ pentaquark,

    H. Walliser and H. Weigel, “Bound state versus collective coordinate approaches in chiral soliton models and the width of the Theta+ pentaquark,” Eur. Phys. J. A 26, 361-382 (2005) doi:10.1140/epja/i2005-10180-5 [arXiv:hep-ph/0510055 [hep-ph]]

    arXiv 2005

  2. [98]

    Hyperon Semileptonic decay constants with flavor SU(3) symmetry breaking,

    G. S. Yang and H.-Ch. Kim, “Hyperon Semileptonic decay constants with flavor SU(3) symmetry breaking,” Phys. Rev. C 92, 035206 (2015) doi:10.1103/PhysRevC.92.035206 [arXiv:1504.04453 [hep-ph]]

    arXiv 2015

  3. [72]

    Axial properties of the nucleon with 1/N(c) corrections in the solitonic SU(3) NJL model,

    A. Blotz, M. Praszalowicz and K. Goeke, “Axial properties of the nucleon with 1/N(c) corrections in the solitonic SU(3) NJL model,” Phys. Rev. D 53, 485-503 (1996) doi:10.1103/PhysRevD.53.485 [arXiv:hep-ph/9403314 [hep-ph]]

    arXiv 1996

  4. [1]

    Dokshitzer, D.I

    Yu.L. Dokshitzer, D.I. Dyakonov, S.I. Troyan, ”Hard processes in quantum chromodynamics,” Phys. Rep. 58, 269, 1980

    1980

  5. [2]

    SU(3) Extension of the Skyrme Model,

    P. O. Mazur, M. A. Nowak and M. Praszalowicz, “SU(3) Extension of the Skyrme Model,” Phys. Lett. B 147, 137-140 (1984) doi:10.1016/0370-2693(84)90608-7

    work page doi:10.1016/0370-2693(84)90608-7 1984

  6. [3]

    SU(3) skyrmion,

    M. Praszalowicz, “SU(3) skyrmion,” Jagiellonian University preprint TPJU-5-87. In Skyrmions And Anomalies eds. M. Jezabek and M. Praszalowicz, World Scientific 1987, p. 112

    1987

  7. [4]

    Baryons as Solitons and Mass Formulae,

    E. Guadagnini, “Baryons as Solitons and Mass Formulae,” Nucl. Phys. B 236, 35-47 (1984) doi:10.1016/0550-3213(84)90523-6

    doi:10.1016/0550-3213(84)90523-6 1984

  8. [5]

    Exotic anti-decuplet of baryons: Prediction from chiral solitons,

    D. Diakonov, V. Petrov and M. V. Polyakov, “Exotic anti-decuplet of baryons: Prediction from chiral solitons,” Z. Phys. A 359, 305-314 (1997) doi:10.1007/s002180050406

    doi:10.1007/s002180050406 1997

Show all 134 references
  1. [6]

    Evidence for a narrow S = +1 baryon resonance in photoproduction from the neutron,

    T. Nakano et al. [LEPS], “Evidence for a narrow S = +1 baryon resonance in photoproduction from the neutron,” Phys. Rev. Lett. 91, 012002 (2003) doi:10.1103/PhysRevLett.91.012002

    2003 doi

  2. [7]

    20 years of Θ +,

    M. Praszalowicz, “20 years of Θ +,” PoS CORFU2023 (2024), 063 doi:10.22323/1.463.0063 [arXiv:2405.09926 [hep-ph]]

    2024 arXiv

  3. [8]

    Observation of a baryon resonance with positive strangeness in K+ collisions with Xe nuclei,

    V. V. Barmin et al. [DIANA], “Observation of a baryon resonance with positive strangeness in K+ collisions with Xe nuclei,” Phys. Atom. Nucl. 66, 1715-1718 (2003) doi:10.1134/1.1611587

    2003 doi

  4. [9]

    A Subatomic Discovery Emerges From Experiments in Japan,

    K. Chang, “A Subatomic Discovery Emerges From Experiments in Japan,” New York Times, July 1, 2003

    2003

  5. [10]

    A Diquark - triquark model for the K N pentaquark,

    M. Karliner and H. J. Lipkin, “A Diquark - triquark model for the K N pentaquark,” Phys. Lett. B 575, 249-255 (2003) doi:10.1016/j.physletb.2003.09.062

    2003 doi

  6. [11]

    On photoexcitation of baryon anti-decuplet,

    M. V. Polyakov and A. Rathke, “On photoexcitation of baryon anti-decuplet,” Eur. Phys. J. A 18, 691-695 (2003) doi:10.1140/epja/i2003-10029-y 36

    2003 doi

  7. [12]

    Exotic baryon states in topological soliton models,

    H. Walliser and V. B. Kopeliovich, “Exotic baryon states in topological soliton models,” J. Exp. Theor. Phys. 97, 433-440 (2003) doi:10.1134/1.1618331

    2003 doi

  8. [13]

    Eidelman et al

    S. Eidelman et al. (Particle Data Group), Phys. Lett. B 592, 1 (2004)

    2004

  9. [14]

    Amsler et al

    C. Amsler et al. (Particle Data Group), Physics Letters B667, 1 (2008)

    2008

  10. [15]

    Further evidence for formation of a narrow baryon resonance with positive strangeness in K+ collisions with Xe nuclei,

    V. V. Barmin et al. [DIANA], “Further evidence for formation of a narrow baryon resonance with positive strangeness in K+ collisions with Xe nuclei,” Phys. Atom. Nucl. 70, 35-43 (2007) doi:10.1134/S106377880701005X

    2007 doi

  11. [16]

    Formation of a narrow baryon resonance with positive strangeness in K+ collisions with Xe nuclei,

    V. V. Barmin et al. [DIANA], “Formation of a narrow baryon resonance with positive strangeness in K+ collisions with Xe nuclei,” Phys. Atom. Nucl. 73, 1168-1175 (2010) doi:10.1134/S1063778810070100

    2010 doi

  12. [17]

    Observation of a narrow baryon resonance with positive strangeness formed in K +Xe collisions,

    V. V. Barmin et al. [DIANA], “Observation of a narrow baryon resonance with positive strangeness formed in K +Xe collisions,” Phys. Rev. C 89, no.4, 045204 (2014) doi:10.1103/PhysRevC.89.045204

    2014 doi

  13. [18]

    Evidence of the Theta+ in the gamma d — > K+ K- pn reaction,

    T. Nakano et al. [LEPS], “Evidence of the Theta+ in the gamma d — > K+ K- pn reaction,” Phys. Rev. C 79, 025210 (2009) doi:10.1103/PhysRevC.79.025210

    2009 doi

  14. [19]

    Status of the Theta+ analysis at LEPS,

    T. Nakano [LEPS], “Status of the Theta+ analysis at LEPS,” Nucl. Phys. A 835, 254-260 (2010) doi:10.1016/j.nuclphysa.2010.01.200

    2010 doi

  15. [20]

    Y. I. Azimov, K. Goeke and I. Strakovsky, Phys. Rev. D 76 (2007), 074013 doi:10.1103/PhysRevD.76.074013 [arXiv:0708.2675 [hep-ph]]

    2007 arXiv

  16. [21]

    See an interview with V. Yu. Petrov recorded by Tatiana Diakonova in 2013 available on YouTube: https : //youtu.be/2ggN 6P ct6g

    2013

  17. [22]

    Chiral soliton predictions for exotic baryons,

    J. R. Ellis, M. Karliner and M. Praszalowicz, “Chiral soliton predictions for exotic baryons,” JHEP 05, 002 (2004) doi:10.1088/1126-6708/2004/05/002 [arXiv:hep-ph/0401127 [hep-ph]]

    2004 arXiv

  18. [23]

    Symmetries of baryons and mesons,

    M. Gell-Mann, “Symmetries of baryons and mesons,” Phys. Rev. 125, 1067-1084 (1962) doi:10.1103/PhysRev.125.1067

    1962 doi

  19. [24]

    A Schematic Model of Baryons and Mesons,

    M. Gell-Mann, “A Schematic Model of Baryons and Mesons,” Phys. Lett. 8, 214-215 (1964)

    1964

  20. [25]

    R. L. Jaffe, SLAC-PUB-1774 Talk presented at the Topi- cal Conf. on Baryon Resonances, Oxford, Eng., Jul 5-9, 1976

    1976

  21. [26]

    Multi - Quark Baryons and the MIT Bag Model,

    D. Strottman, “Multi - Quark Baryons and the MIT Bag Model,” Phys. Rev. D 20, 748-767 (1979) doi:10.1103/PhysRevD.20.748

    1979 doi

  22. [27]

    Aguilar-Benitez et al

    M. Aguilar-Benitez et al. [Particle Data Group], Phys. Lett. B 170, 1-350 (1986)

    1986

  23. [28]

    SU(3) constraints on cryptoexotic pentaquarks,

    M. Praszalowicz, “SU(3) constraints on cryptoexotic pentaquarks,” Annalen Phys. 13, 709-717 (2004) doi:10.1002/andp.200410113

    2004 doi

  24. [29]

    Diquarks and exotic spectroscopy,

    R. L. Jaffe and F. Wilczek, “Diquarks and exotic spectroscopy,” Phys. Rev. Lett. 91, 232003 (2003) doi:10.1103/PhysRevLett.91.232003

    2003 doi

  25. [30]

    Navas et al

    S. Navas et al. [Particle Data Group], Phys. Rev. D 110 (2024) no.3, 030001 doi:10.1103/PhysRevD.110.030001 37

    2024 doi

  26. [31]

    Phenomenological constraints on the Jaffe-Wilczek model of pentaquarks,

    T. D. Cohen, “Phenomenological constraints on the Jaffe-Wilczek model of pentaquarks,” Phys. Rev. D 70, 074023 (2004) doi:10.1103/PhysRevD.70.074023 [arXiv:hep-ph/0402056 [hep-ph]]

    2004 arXiv

  27. [32]

    Zeldovich and A.D

    Ya.B. Zeldovich and A.D. Sakharov, Yad. Fiz 4, 395 (1966) [Sov. J. Nucl. Phys. 4, 283 (1967)]

    1966

  28. [33]

    Signal of Theta+ in quenched lattice QCD with exact chiral symmetry,

    T. W. Chiu and T. H. Hsieh, “Signal of Theta+ in quenched lattice QCD with exact chiral symmetry,” doi:10.1142/9789812701855 0047 [arXiv:hep-ph/0501227 [hep-ph]], Contribution to: International Workshop on PENTAQUARK04, p. 331

    arXiv

  29. [34]

    Anisotropic lattice QCD studies of penta-quark anti-decuplet,

    N. Ishii, T. Doi, H. Iida, M. Oka, F. Okiharu and H. Suganuma, “Anisotropic lattice QCD studies of penta-quark anti-decuplet,” doi:10.1142/9789812701855 0045 [arXiv:hep-lat/0410022 [hep-lat]], Contribution to: International Workshop on PENTAQUARK04, p. 316

    arXiv

  30. [35]

    Lattice QCD study of the pentaquark baryons,

    T. T. Takahashi, T. Umeda, T. Onogi and T. Kunihiro, “Lattice QCD study of the pentaquark baryons,” doi:10.1142/9789812701855 0046 [arXiv:hep-lat/0410025 [hep-lat]]. Contribution to: International Workshop on PENTAQUARK04, p. 324

    arXiv

  31. [36]

    Pentaquark baryons from lattice calculations,

    S. Sasaki, “Pentaquark baryons from lattice calculations,” Contribution to: International Workshop on PENTAQUARK04, p. 298

  32. [37]

    Dynamical Model of Elementary Particles Based on an Analogy with Superconductivity. I.,

    Y. Nambu and G. Jona-Lasinio, “Dynamical Model of Elementary Particles Based on an Analogy with Superconductivity. I.,” Phys. Rev. 122, 345-358 (1961)

    1961

  33. [38]

    Dynamical Model of Elementary Particles Based on an Analogy with Superconductivity. II.,

    Y. Nambu and G. Jona-Lasinio, “Dynamical Model of Elementary Particles Based on an Analogy with Superconductivity. II.,” Phys. Rev. 124, 246-254 (1961)

    1961

  34. [39]

    A Theory of Light Quarks in the Instanton Vacuum,

    D. Diakonov and V. Y. Petrov, “A Theory of Light Quarks in the Instanton Vacuum,” Nucl. Phys. B 272, 457-489 (1986) doi:10.1016/0550-3213(86)90011-8

    1986 doi

  35. [40]

    Diakonov, in Skyrmions and Anomalies , eds

    D. Diakonov, in Skyrmions and Anomalies , eds. M. Je˙ zabek and M. Prasza lowicz, World Scientific, 1987, p.27

    1987

  36. [41]

    Instanton Based Vacuum from Feynman Variational Principle,

    D. Diakonov and V. Y. Petrov, “Instanton Based Vacuum from Feynman Variational Principle,” Nucl. Phys. B 245, 259-292 (1984) doi:10.1016/0550-3213(84)90432-2

    1984 doi

  37. [42]

    Theory and phenomenology of the QCD vacuum,

    E. V. Shuryak, “Theory and phenomenology of the QCD vacuum,” Phys. Rept. 115, 151 (1984) doi:10.1016/0370-1573(84)90037-1

    1984 doi

  38. [43]

    A theory of baryon resonances at large Nc,

    D. Diakonov, V. Petrov and A. A. Vladimirov, “A theory of baryon resonances at large Nc,” Phys. Rev. D 88, no.7, 074030 (2013) doi:10.1103/PhysRevD.88.074030 [arXiv:1308.0947 [hep-ph]]

    2013 arXiv

  39. [44]

    Chiral Lagrangian from a functional integral over quarks,

    D. Diakonov and M. I. Eides, “Chiral Lagrangian from a functional integral over quarks,” JETP Lett. 38, 433-436 (1983)

    1983

  40. [45]

    Effective Lagrangian from QCD Anomalies,

    J. Balog, “Effective Lagrangian from QCD Anomalies,” Phys. Lett. B 149, 197-200 (1984) doi:10.1016/0370-2693(84)91583-1

    1984 doi

  41. [46]

    Quark Models and Chiral Lagrangians,

    M. Praszalowicz and G. Valencia, “Quark Models and Chiral Lagrangians,” Nucl. Phys. B 341, 27-49 (1990) doi:10.1016/0550-3213(90)90261-B 38

    1990 doi

  42. [47]

    The Low-energy expansion of the generalized SU(3) NJL model,

    E. Ruiz Arriola, “The Low-energy expansion of the generalized SU(3) NJL model,” Phys. Lett. B 253, 430-435 (1991) doi:10.1016/0370-2693(91)91746-I

    1991 doi

  43. [48]

    Introduction to chiral perturbation theory,

    S. Scherer, “Introduction to chiral perturbation theory,” Adv. Nucl. Phys. 27, 277 (2003) [arXiv:hep-ph/0210398 [hep-ph]]

    2003 arXiv

  44. [49]

    Phenomenological Lagrangians,

    S. Weinberg, “Phenomenological Lagrangians,” Physica A 96, no.1-2, 327-340 (1979) doi:10.1016/0378-4371(79)90223-1

    1979 doi

  45. [50]

    A Nonlinear field theory,

    T. H. R. Skyrme, “A Nonlinear field theory,” Proc. Roy. Soc. Lond. A 260, 127-138 (1961) doi:10.1098/rspa.1961.0018

    1961

  46. [51]

    A Unified Field Theory of Mesons and Baryons,

    T. H. R. Skyrme, “A Unified Field Theory of Mesons and Baryons,” Nucl. Phys. 31, 556-569 (1962) doi:10.1016/0029-5582(62)90775-7

    1962 doi

  47. [52]

    Global Aspects of Current Algebra,

    E. Witten, “Global Aspects of Current Algebra,” Nucl. Phys. B 223, 422-432 (1983) doi:10.1016/0550-3213(83)90063-9

    1983 doi

  48. [53]

    Current Algebra, Baryons, and Quark Confinement,

    E. Witten, “Current Algebra, Baryons, and Quark Confinement,” Nucl. Phys. B 223, 433-444 (1983) doi:10.1016/0550-3213(83)90064-0

    1983 doi

  49. [54]

    Evaluation of the Derivative Quartic Terms of the Meson Chiral Lagrangian From Forward Dispersion Relation,

    T. N. Pham and T. N. Truong, “Evaluation of the Derivative Quartic Terms of the Meson Chiral Lagrangian From Forward Dispersion Relation,” Phys. Rev. D 31, 3027 (1985) doi:10.1103/PhysRevD.31.3027

    1985 doi

  50. [55]

    Chiral models: Pions and baryons,

    M. Praszalowicz, “Chiral models: Pions and baryons,” Acta Phys. Polon. B 22, 525-585 (1991) TPJU-12-91

    1991

  51. [56]

    Structure of phenomenological Lagrangians. 2.,

    C. G. Callan, Jr., S. R. Coleman, J. Wess and B. Zumino, “Structure of phenomenological Lagrangians. 2.,” Phys. Rev. 177, 2247-2250 (1969) doi:10.1103/PhysRev.177.2247

    1969 doi

  52. [57]

    Consequences of anomalous Ward identities,

    J. Wess and B. Zumino, “Consequences of anomalous Ward identities,” Phys. Lett. B 37, 95-97 (1971) doi:10.1016/0370-2693(71)90582-X

    1971 doi

  53. [58]

    Baryons in the 1/n Expansion,

    E. Witten, “Baryons in the 1/n Expansion,” Nucl. Phys. B 160, 57-115 (1979) doi:10.1016/0550-3213(79)90232-3

    1979 doi

  54. [59]

    Static Properties of Nucleons in the Skyrme Model,

    G. S. Adkins, C. R. Nappi and E. Witten, “Static Properties of Nucleons in the Skyrme Model,” Nucl. Phys. B 228, 552 (1983) doi:10.1016/0550-3213(83)90559-X

    1983 doi

  55. [60]

    Hosaka in this volume

    A. Hosaka in this volume

  56. [61]

    Nucleon Mass and Nucleon Σ Term,

    D. Diakonov, V. Y. Petrov and M. Praszalowicz, “Nucleon Mass and Nucleon Σ Term,” Nucl. Phys. B 323, 53-74 (1989) doi:10.1016/0550-3213(89)90587-7

    1989 doi

  57. [62]

    Pion mass dependence of the nucleon mass and chiral extrapolation of lattice data in the chiral quark soliton model,

    K. Goeke, J. Ossmann, P. Schweitzer and A. Silva, “Pion mass dependence of the nucleon mass and chiral extrapolation of lattice data in the chiral quark soliton model,” Eur. Phys. J. A 27, 77-90 (2006), doi:10.1140/epja/i2005-10229-5, [arXiv:hep-lat/0505010 [hep-lat]]

    2006 arXiv

  58. [63]

    A Comment on the Phenomenology of the SU(3) Skyrme Model,

    M. Praszalowicz, “A Comment on the Phenomenology of the SU(3) Skyrme Model,” Phys. Lett. B 158, 264-269 (1985) doi:10.1016/0370-2693(85)90968-2

    1985 doi

  59. [64]

    On the Casimir energy of a skyrmion,

    B. Moussallam and D. Kalafatis, “On the Casimir energy of a skyrmion,” Phys. Lett. B 272, 196-201 (1991) doi:10.1016/0370-2693(91)91819-H 39

    1991 doi

  60. [65]

    Quantum corrections to nucleon and delta mass in the Skyrme model,

    G. Holzwarth, “Quantum corrections to nucleon and delta mass in the Skyrme model,” Phys. Lett. B 291, 218-222 (1992) doi:10.1016/0370-2693(92)91034-7

    1992 doi

  61. [66]

    A Doubly Strange Dibaryon in the Chiral Model,

    A. P. Balachandran, A. Barducci, F. Lizzi, V. G. J. Rodgers and A. Stern, “A Doubly Strange Dibaryon in the Chiral Model,” Phys. Rev. Lett. 52, 887 (1984) doi:10.1103/PhysRevLett.52.887

    1984 doi

  62. [67]

    Dibaryons as Chiral Solitons,

    A. P. Balachandran, F. Lizzi, V. G. J. Rodgers and A. Stern, “Dibaryons as Chiral Solitons,” Nucl. Phys. B 256, 525-556 (1985) doi:10.1016/0550-3213(85)90407-9

    1985 doi

  63. [68]

    Baryons as nontopological chiral solitons,

    C. V. Christov, A. Blotz, H. C. Kim, P. Pobylitsa, T. Watabe, T. Meissner, E. Ruiz Arriola and K. Goeke, “Baryons as nontopological chiral solitons,” Prog. Part. Nucl. Phys. 37, 91-191 (1996) doi:10.1016/0146-6410(96)00057-9 [arXiv:hep-ph/9604441 [hep-ph]]

    1996 arXiv

  64. [69]

    Large-N baryons: Collective coordinates of the topological soliton in the SU(3) chiral model,

    S. Jain and S. R. Wadia, “Large-N baryons: Collective coordinates of the topological soliton in the SU(3) chiral model,” Nucl. Phys. B 258, 713-725 (1985) doi:10.1016/0550-3213(85)90632-7

    1985 doi

  65. [70]

    Skyrme Model of Baryon Octet and Decuplet,

    M. Chemtob, “Skyrme Model of Baryon Octet and Decuplet,” Nucl. Phys. B 256, 600-608 (1985) doi:10.1016/0550-3213(85)90409-2

    1985 doi

  66. [71]

    Quantum Mechanics: Non-Relativistic Theory. Vol. 3 (3rd ed.)

    L. D. Landau and E. M. Lifshitz, “Quantum Mechanics: Non-Relativistic Theory. Vol. 3 (3rd ed.)” (1977), Pergamon Press. ISBN 978-0-08-020940-1

    1977

  67. [74]

    Strong decays of exotic and nonexotic heavy baryons in the chiral quark-soliton model,

    H. C. Kim, M. V. Polyakov, M. Praszalowicz and G. S. Yang, “Strong decays of exotic and nonexotic heavy baryons in the chiral quark-soliton model,” Phys. Rev. D 96, no.9, 094021 (2017) [erratum: Phys. Rev. D 97, no.3, 039901 (2018)]. doi:10.1103/PhysRevD.96.094021 [arXiv:1709....

    2017 arXiv

  68. [75]

    Strong Decays of Charmed Baryons in Heavy Hadron Chiral Perturbation Theory,

    H. Y. Cheng and C. K. Chua, “Strong Decays of Charmed Baryons in Heavy Hadron Chiral Perturbation Theory,” Phys. Rev. D 75 (2007) 014006 doi:10.1103/PhysRevD.75.014006 [hep-ph/0610283]

    2007 arXiv

  69. [76]

    Strong Decays of Charmed Baryons in Heavy Hadron Chiral Perturbation Theory: An Update,

    H. Y. Cheng and C. K. Chua, “Strong Decays of Charmed Baryons in Heavy Hadron Chiral Perturbation Theory: An Update,” Phys. Rev. D 92 (2015) no.7, 074014 doi:10.1103/PhysRevD.92.074014 [arXiv:1508.05653 [hep-ph]]

    2015 arXiv

  70. [77]

    The Octet model and its Clebsch-Gordan coefficients,

    J. J. de Swart, “The Octet model and its Clebsch-Gordan coefficients,” Rev. Mod. Phys. 35, 916-939 (1963) [erratum: Rev. Mod. Phys. 37, 326-326 (1965)] doi:10.1103/RevModPhys.35.916 40

    1963 doi

  71. [78]

    Weak Decays of Heavy Mesons in the Static Quark Approximation,

    N. Isgur and M. B. Wise, “Weak Decays of Heavy Mesons in the Static Quark Approximation,” Phys. Lett. B 232, 113 (1989). doi:10.1016/0370-2693(89)90566-2

    1989 doi

  72. [79]

    Spectroscopy with heavy quark symmetry,

    N. Isgur and M. B. Wise, “Spectroscopy with heavy quark symmetry,” Phys. Rev. Lett. 66, 1130 (1991). doi:10.1103/PhysRevLett.66.1130

    1991 doi

  73. [80]

    An Effective Field Theory for Heavy Quarks at Low-energies,

    H. Georgi, “An Effective Field Theory for Heavy Quarks at Low-energies,” Phys. Lett. B 240, 447 (1990). doi:10.1016/0370-2693(90)91128-X [81]

    1990 doi

  74. [81]

    Prediction of New Charmed and Bottom Exotic Pentaquarks,

    D. Diakonov, “Prediction of New Charmed and Bottom Exotic Pentaquarks,” arXiv:1003.2157 [hep-ph]

    arXiv

  75. [82]

    Pion mean fields and heavy baryons,

    G. S. Yang, H. C. Kim, M. V. Polyakov and M. Prasza lowicz, “Pion mean fields and heavy baryons,” Phys. Rev. D 94, 071502 (2016) doi:10.1103/PhysRevD.94.071502 [arXiv:1607.07089 [hep-ph]]

    2016 arXiv

  76. [83]

    Landscape of heavy baryons from the perspective of the chiral quark-soliton model,

    M. V. Polyakov and M. Praszalowicz, “Landscape of heavy baryons from the perspective of the chiral quark-soliton model,” Phys. Rev. D 105, no.9, 094004 (2022) doi:10.1103/PhysRevD.105.094004 [arXiv:2201.07293 [hep-ph]]

    2022 arXiv

  77. [84]

    Possibility of the existence of charmed exotica,

    H. C. Kim, M. V. Polyakov and M. Prasza lowicz, “Possibility of the existence of charmed exotica,” Phys. Rev. D 96, no.1, 014009 (2017) doi:10.1103/PhysRevD.96.014009 [arXiv:1704.04082 [hep-ph]]

    2017 arXiv

  78. [85]

    Invisible charm exotica,

    M. Prasza lowicz and M. Kucab, “Invisible charm exotica,” Phys. Rev. D 107, no.3, 034011 (2023) doi:10.1103/PhysRevD.107.034011 [arXiv:2211.01470 [hep-ph]]

    2023 arXiv

  79. [86]

    Observation of five new narrow Ω 0 c states decaying to Ξ + c K −,

    R. Aaij et al. [LHCb Collaboration], “Observation of five new narrow Ω 0 c states decaying to Ξ + c K −,” Phys. Rev. Lett. 118, no. 18, 182001 (2017)

    2017

  80. [87]

    Observation of excited Ω 0 c baryons in Ω− b → Ξ+ c K −π−decays,

    R. Aaij et al. [LHCb], “Observation of excited Ω 0 c baryons in Ω− b → Ξ+ c K −π−decays,” Phys. Rev. D 104, no.9, 9 (2021) doi:10.1103/PhysRevD.104.L091102 [arXiv:2107.03419 [hep-ex]]

    2021

  81. [88]

    Observation of Excited Ω c Charmed Baryons in e+e− Collisions,

    J. Yelton et al. [Belle], “Observation of Excited Ω c Charmed Baryons in e+e− Collisions,” Phys. Rev. D 97, no.5, 051102 (2018) doi:10.1103/PhysRevD.97.051102 [arXiv:1711.07927 [hep-ex]]

    2018 arXiv

  82. [89]

    Baryons as Quarks in a Skyrmion Bubble,

    L. C. Biedenharn, Y. Dothan and A. Stern, “Baryons as Quarks in a Skyrmion Bubble,” Phys. Lett. B 146, 289-293 (1984) doi:10.1016/0370-2693(84)91698-8

    1984 doi

  83. [90]

    Monopolar Harmonics In SU(3) F as Eigenstates of the Skyrme-Witten Model for Baryons,

    L. C. Biedenharn and Y. Dothan, “Monopolar Harmonics In SU(3) F as Eigenstates of the Skyrme-Witten Model for Baryons,” Print-84-1039 (DUKE)

  84. [91]

    Model Independent Relations for Baryons as Solitons in Mesonic Theories,

    G. S. Adkins and C. R. Nappi, “Model Independent Relations for Baryons as Solitons in Mesonic Theories,” Nucl. Phys. B 249, 507-518 (1985) doi:10.1016/0550-3213(85)90089-6

    1985 doi

  85. [92]

    Pentaquark in the Skyrme model,

    M. Praszalowicz, “Pentaquark in the Skyrme model,” Phys. Lett. B 575, 234-241 (2003) doi:10.1016/j.physletb.2003.09.049 [arXiv:hep-ph/0308114 [hep-ph]]. 41

    2003 arXiv

  86. [93]

    Observation of an exotic S = -2, Q = -2 baryon resonance in proton proton collisions at the CERN SPS,

    C. Alt et al. [NA49], “Observation of an exotic S = -2, Q = -2 baryon resonance in proton proton collisions at the CERN SPS,” Phys. Rev. Lett. 92, 042003 (2004) doi:10.1103/PhysRevLett.92.042003 [arXiv:hep-ex/0310014 [hep-ex]]

    2004 arXiv

  87. [94]

    Search for an Exotic S = −2, Q= −2 baryon resonance in proton-proton interactions at √sN N = 17.3 GeV,

    A. Aduszkiewicz et al. [NA61/SHINE], “Search for an Exotic S = −2, Q= −2 baryon resonance in proton-proton interactions at √sN N = 17.3 GeV,” Phys. Rev. D 101, no.5, 051101 (2020) doi:10.1103/PhysRevD.101.051101 [arXiv:1912.12198 [hep-ex]]

    2020 arXiv

  88. [95]

    Radial excitations of low lying baryons and the Z+ pentaquark,

    H. Weigel, “Radial excitations of low lying baryons and the Z+ pentaquark,” Eur. Phys. J. A 2, 391 (1998) doi:10.1007/s100500050136 [arXiv:hep-ph/9804260 [hep-ph]]

    1998 arXiv

  89. [96]

    Rotational corrections to axial currents in semibosonized SU(3) Nambu-Jona-Lasinio model,

    A. Blotz, M. Praszalowicz and K. Goeke, “Rotational corrections to axial currents in semibosonized SU(3) Nambu-Jona-Lasinio model,” Phys. Lett. B 317, 195 (1993) doi:10.1016/0370-2693(93)91592-B [hep-ph/9308284]

    1993 arXiv

  90. [97]

    Quantization ambiguities of the SU(3) soliton,

    M. Praszalowicz, T. Watabe and K. Goeke, “Quantization ambiguities of the SU(3) soliton,” Nucl. Phys. A 647, 49 (1999) doi:10.1016/S0375-9474(99)00008-1 [hep-ph/9806431]

    1999 arXiv

  91. [99]

    The Width of Theta+ for large N(c) in chiral quark soliton model,

    M. Praszalowicz, “The Width of Theta+ for large N(c) in chiral quark soliton model,” Phys. Lett. B 583, 96-102 (2004) doi:10.1016/j.physletb.2003.12.056 [arXiv:hep-ph/0311230 [hep-ph]]

    2004 arXiv

  92. [100]

    The width of the Theta+ exotic baryon in the chiral soliton model,

    R. L. Jaffe, “The width of the Theta+ exotic baryon in the chiral soliton model,” Eur. Phys. J. C 35, 221-222 (2004) doi:10.1140/epjc/s2004-01815-4 [arXiv:hep-ph/0401187 [hep-ph]]

    2004 arXiv

  93. [102]

    Comment on hep-ph/0404212 by D. Diakonov, V. Petrov, and M. Polyakov,

    R. L. Jaffe, “Comment on hep-ph/0404212 by D. Diakonov, V. Petrov, and M. Polyakov,” [arXiv:hep-ph/0405268 [hep-ph]]

    arXiv

  94. [103]

    SU(3) breaking in decays of exotic baryons,

    M. Praszalowicz, “SU(3) breaking in decays of exotic baryons,” Acta Phys. Polon. B 35, 1625-1642 (2004) [arXiv:hep-ph/0402038 [hep-ph]]

    2004 arXiv

  95. [104]

    The Pion nucleon Sigma term is definitely large: Results from a G.W.U. analysis of pi nucleon scattering data,

    M. M. Pavan, I. I. Strakovsky, R. L. Workman and R. A. Arndt, “The Pion nucleon Sigma term is definitely large: Results from a G.W.U. analysis of pi nucleon scattering data,” PiN Newslett. 16, 110-115 (2002) [arXiv:hep-ph/0111066 [hep-ph]]

    2002 arXiv

  96. [105]

    Brief history of the pion–nucleon sigma term,

    J. M. Alarc´ on, “Brief history of the pion–nucleon sigma term,” Eur. Phys. J. ST 230, no.6, 1609-1622 (2021) doi:10.1140/epjs/s11734-021-00145-6 [arXiv:2205.01108 [hep-ph]]

    2021 arXiv

  97. [106]

    New Narrow Nucleon N*(1685),

    V. Kuznetsov and M. V. Polyakov, “New Narrow Nucleon N*(1685),” JETP Lett. 88, 347-350 (2008) doi:10.1134/S002136400818001X [arXiv:0807.3217 [hep-ph]]

    2008 arXiv

  98. [107]

    η photoproduction off the neutron at GRAAL: Evidence for a resonant structure at W = 1.67-GeV,

    V. Kuznetsov et al. [GRAAL], “η photoproduction off the neutron at GRAAL: Evidence for a resonant structure at W = 1.67-GeV,” doi:10.1142/9789812702272 0022 [arXiv:hep-ex/0409032 [hep-ex]]. 42

    arXiv

  99. [108]

    Evidence for a narrow structure at W˜1.68-GeV in eta photoproduction on the neutron,

    V. Kuznetsov et al. [GRAAL], “Evidence for a narrow structure at W˜1.68-GeV in eta photoproduction on the neutron,” Phys. Lett. B 647, 23-29 (2007) doi:10.1016/j.physletb.2007.01.041 [arXiv:hep-ex/0606065 [hep-ex]]

    2007 arXiv

  100. [109]

    Evidence for a narrow N*(1685) resonance in eta photoproduction off the nucleon,

    V. Kuznetsov, M. V. Polyakov, T. Boiko, J. Jang, A. Kim, W. Kim, H. S. Lee, A. Ni and G. S. Yang, “Evidence for a narrow N*(1685) resonance in eta photoproduction off the nucleon,” Acta Phys. Polon. B 39, 1949-1967 (2008) [arXiv:0807.2316 [hep-ex]]

    2008 arXiv

  101. [110]

    Quasi-free photoproduction of eta-mesons of the neutron,

    I. Jaegle et al. [CBELSA and TAPS], “Quasi-free photoproduction of eta-mesons of the neutron,” Phys. Rev. Lett. 100, 252002 (2008) doi:10.1103/PhysRevLett.100.252002 [arXiv:0804.4841 [nucl-ex]]

    2008 arXiv

  102. [111]

    N* (1670) observed at LNS, Sendai,

    H. Shimizu, F. Miyahara, T. Nakabayashi, H. Fukasawa, R. Hashimoto, T. Ishikawa, T. Iwata, H. Kanda, J. Kasagi and T. Kinoshita, et al. “N* (1670) observed at LNS, Sendai,” doi:10.1007/978-3-540-85144-8 12

    doi

  103. [112]

    History of N(1680),

    I. Strakovsky, “History of N(1680),” published in this volume of Acta Physica Polonica B [arXiv:2405.13749 [hep-ph]]

    arXiv

  104. [113]

    eta-photoproduction in the resonance energy region,

    V. Shklyar, H. Lenske and U. Mosel, “eta-photoproduction in the resonance energy region,” Phys. Lett. B 650, 172-178 (2007) doi:10.1016/j.physletb.2007.05.005 [arXiv:nucl-th/0611036 [nucl-th]]

    2007 arXiv

  105. [114]

    Photoproduction of eta mesons off neutrons from a deuteron target,

    A. V. Anisovich, I. Jaegle, E. Klempt, B. Krusche, V. A. Nikonov, A. V. Sarantsev and U. Thoma, “Photoproduction of eta mesons off neutrons from a deuteron target,” Eur. Phys. J. A 41, 13-24 (2009) doi:10.1140/epja/i2009-10766-9 [arXiv:0809.3340 [hep-ph]]

    2009 arXiv

  106. [115]

    Doring and K

    M. Doring and K. Nakayama, Phys. Lett. B 683, 145-149 (2010) doi:10.1016/j.physletb.2009.12.029 [arXiv:0909.3538 [nucl-th]]

    2010 arXiv

  107. [116]

    Nonstrange and other unitarity partners of the exotic Theta+ baryon,

    R. A. Arndt, Y. I. Azimov, M. V. Polyakov, I. I. Strakovsky and R. L. Workman, “Nonstrange and other unitarity partners of the exotic Theta+ baryon,” Phys. Rev. C 69, 035208 (2004) [arXiv:nucl-th/0312126]

    2004 arXiv

  108. [117]

    On strange SU(3) partners of Theta+,

    K. Goeke, M. V. Polyakov and M. Praszalowicz, “On strange SU(3) partners of Theta+,” Acta Phys. Polon. B 42, 61-83 (2011) doi:10.5506/APhysPolB.42.61 [arXiv:0912.0469 [hep-ph]]

    2011 arXiv

  109. [118]

    Experimental review on pentaquarks,

    M. Danilov and R. Mizuk, “Experimental review on pentaquarks,” Phys. Atom. Nucl. 71, 605-617 (2008) doi:10.1134/S1063778808040029 [arXiv:0704.3531 [hep-ex]]

    2008 arXiv

  110. [119]

    Present status on experimental search for pentaquarks,

    T. Liu, Y. Mao and B. Q. Ma, “Present status on experimental search for pentaquarks,” Int. J. Mod. Phys. A 29, no.13, 1430020 (2014) doi:10.1142/S0217751X14300208 [arXiv:1403.4455 [hep-ex]]

    2014 arXiv

  111. [120]

    QCD and the strange baryon spectrum,

    T. Hyodo and M. Niiyama, “QCD and the strange baryon spectrum,” Prog. Part. Nucl. Phys. 120, 103868 (2021)

    2021

  112. [121]

    Amaryan, History and geography of light pentaquark searches: challenges and pitfalls , Eur

    M. Amaryan, History and geography of light pentaquark searches: challenges and pitfalls , Eur. Phys. J. Plus 137 (2022) 684, doi:10.1140/epjp/s13360-022-02888-0, [arXiv:2201.04885 [hep-ex]]

    2022 arXiv

  113. [122]

    Search for the Θ + pentaquark in the reaction gamma d — > p K- K+ n,

    B. McKinnon et al. [CLAS], “Search for the Θ + pentaquark in the reaction gamma d — > p K- K+ n,” Phys. Rev. Lett. 96, 212001 (2006). 43

    2006

  114. [123]

    Observation of an exotic S = +1 baryon in exclusive photoproduction from the deuteron,

    S. Stepanyan et al. [CLAS], “Observation of an exotic S = +1 baryon in exclusive photoproduction from the deuteron,” Phys. Rev. Lett. 91, 252001 (2003)

    2003

  115. [124]

    Present and Future of LEPS and LEPS2,

    T. Nakano [LEPS and LEPS2], “Present and Future of LEPS and LEPS2,” JPS Conf. Proc. 17, 061002 (2017)

    2017

  116. [125]

    Recent Results from LEPS,

    T. Nakano [LEPS and LEPS2], “Recent Results from LEPS,” JPS Conf. Proc. 13, 010007 (2017)

    2017

  117. [126]

    Recent results from LEPS and status of LEPS2,

    M. Yosoi [LEPS/LEPS2], “Recent results from LEPS and status of LEPS2,” EPJ Web Conf. 199, 01020 (2019) doi:10.1051/epjconf/201919901020

    2019

  118. [127]

    Nakano, private communication

    T. Nakano, private communication

  119. [128]

    J. K. Ahn and S. H. Kim, J. Korean Phys. Soc. 82, no.6, 579-585 (2023) doi:10.1007/s40042-023-00709-w

    2023 doi

  120. [129]

    Amarian, D

    M. Amarian, D. Diakonov and M. V. Polyakov, To see the exotic Theta+ baryon from interference, Phys. Rev. D 78 (2008) 074003, doi:10.1103/PhysRevD.78.074003, [arXiv:hep-ph/0612150 [hep-ph]]

    2008 arXiv

  121. [130]

    M. J. Amaryan, G. Gavalian, C. Nepali, M. V. Polyakov, Y. Azimov, W. J. Briscoe, G. E. Dodge, C. E. Hyde, F. Klein and V. Kuznetsov, et al. Observation of a narrow structure in p(γ, Ks)X via interference with ϕ-meson production, Phys. Rev. C 85 (2012) 035209, doi:10.1103/PhysR...

    2012 arXiv

  122. [131]

    Anghinolfi et al

    M. Anghinolfi et al. [CLAS], Comment on the narrow structure reported by Amaryan et al , [arXiv:1204.1105 [hep-ex]]

    arXiv

  123. [132]

    Sekihara, H

    T. Sekihara, H. C. Kim and A. Hosaka, PTEP 2020, no.6, 063D03 (2020) doi:10.1093/ptep/ptaa070 [arXiv:1910.09252 [hep-ph]]

    2020 arXiv

  124. [133]

    Search for the Theta(1540)+ pentaquark using kaon secondary interactions at BELLE,

    K. Abe et al. [Belle], “Search for the Theta(1540)+ pentaquark using kaon secondary interactions at BELLE,” Phys. Lett. B 632, 173-180 (2006)

    2006

  125. [134]

    Amaryan et al

    M. Amaryan et al. [KLF], Strange Hadron Spectroscopy with Secondary KL Beam in Hall D , [arXiv:2008.08215 [nucl-ex]]

    2008 arXiv

  126. [135]

    M. J. Amaryan et al. [KLF], Search for Θ+ in KLp → K +n reaction in KLF at JLab , Mod. Phys. Lett. A 39 (2024) 2450063, [arXiv:2401.05887 [hep-ex]]

    2024 arXiv

Pith tools

Reviewed August 12, 2026 · model on record in the stance chip above.