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arxiv: 2606.01177 · v1 · pith:YAOWOJQMnew · submitted 2026-05-31 · ✦ hep-ph

Systematic Study of Coupled-Channel Dynamics in Doubly Heavy Hadronic Molecules

Yu-Shan Ren , Guang-Juan Wang , Zhi Yang , Jia-Jun Wu This is my paper

Pith reviewed 2026-06-28 17:10 UTC · model grok-4.3

classification ✦ hep-ph
keywords doubly heavy tetraquarkscoupled-channel effectsone-boson-exchangeT_cc moleculeheavy quark spin symmetryhadronic moleculesS-wave states
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The pith

Coupled-channel dynamics must be treated explicitly for reliable predictions of excited doubly heavy tetraquarks.

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

This paper tests whether heavy quark spin symmetry extensions of effective interactions fitted to the T_cc+ state remain reliable when applied to higher doubly heavy tetraquarks. It contrasts a single-channel approach, where each threshold is treated separately, with a coupled-channel framework that includes transitions between channels such as DD* and D*D*. Both methods agree on the near-threshold T_cc state as a weakly bound DD* molecule and on some bottom-sector predictions. For states further above threshold, however, the coupled treatment alters the pole positions substantially, often moving them out of the physical region. The result is that single-channel models suffice only for the lowest states while coupled-channel dynamics become essential for excited ones.

Core claim

The authors find that both the single-channel and coupled-channel schemes give consistent results for the lowest-lying states in the doubly heavy systems, confirming the T_cc as an isoscalar DD* molecule with a binding energy of about 381 keV, predicting a deeply bound isoscalar T_bb state with 40-60 MeV binding, an isovector T'_bb resonance, and a virtual T_bc state. For higher-lying states, the inclusion of explicit coupled-channel dynamics modifies the effective interaction and leads to significant changes in the pole structure, shifting predicted bound or resonant states far from the physical region or eliminating them entirely.

What carries the argument

One-boson-exchange potential model extended by heavy quark spin symmetry, with interactions determined by fitting the T_cc+ lineshape, and poles extracted via complex scaling method and T-matrix analysis in single-channel versus coupled-channel schemes.

Load-bearing premise

The one-boson-exchange potential with parameters fixed solely from the T_cc+ lineshape accurately describes interactions in heavier sectors and at higher energies when combined with heavy quark spin symmetry.

What would settle it

Detection or non-detection of a specific higher-lying pole in the D(*)D(*) system whose position matches one scheme but contradicts the other would test the necessity of coupled channels.

read the original abstract

Heavy Quark Spin Symmetry (HQSS) is widely use to predict heavy molecules by extending the effective interactions fitted from low-lying states to heavier sectors. In this work, we systematically investigate the reliability of this approach for higher double heavy tetraquarks by comparing a single-channel effective interaction (Scheme I) with an explicit coupled-channel dynamics framework (Scheme II). The interactions are obtained within one-boson-exchange potential model and fixed by fitting the $T_{cc}^+$ lineshape. Utilizing the complex scaling method and $T$-matrix pole analysis, we extract the possible poles in the $S$-wave $D^{(*)}D^{(*)}$, $\bar{B}^{(*)}\bar{B}^{(*)}$ and $D^{(*)}\bar{B}^{(*)}$ systems with $J^{P}=1^+$. We find that both schemes provide consistent descriptions of the lowest-lying state. This confirms isoscalar-dominated $T_{cc}$ as a predominant $DD^*$ molecule (binding energy $\sim$ 381 keV), and predicts an isoscalar deeply bound $T_{bb}$ state ($40-60$ MeV) and an isovector $T^\prime_{bb}$ resonance in the bottom sector, together with a virtual $T_{bc}$ state. In contrast, significant differences emerge for higher-lying states. The inclusion of explicit coupled-channel dynamics modifies the effective interaction and reshapes the pole structure. The states predicted as bound or resonant in the single-channel framework can be shifted far from the physical region or disappear. These results indicate that while single-channel descriptions are adequate for near-threshold states, an explicit treatment of coupled-channel dynamics is required for reliable predictions of excited doubly heavy tetraquarks.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

1 major / 0 minor

Summary. The manuscript claims that single-channel OBE potentials (Scheme I), with parameters fixed by fitting the T_cc^+ lineshape and extended via HQSS, adequately describe near-threshold states such as the isoscalar T_cc (binding ~381 keV), a deeply bound T_bb (40-60 MeV), an isovector T'_bb resonance, and a virtual T_bc state. However, for higher-lying excited states in the S-wave D(*)D(*), B(*)B(*), and D(*)B(*) systems with J^P=1^+, explicit coupled-channel dynamics (Scheme II) modify the effective interaction, shifting poles far from the physical region or causing them to disappear, as extracted via the complex scaling method and T-matrix pole analysis. Thus, coupled channels are required for reliable predictions of excited doubly heavy tetraquarks.

Significance. If the central claim holds, the work provides a concrete, falsifiable demonstration that single-channel approximations break down for excited states while remaining viable near threshold, with explicit credit for the systematic Scheme I vs. II comparison, the use of complex scaling for pole extraction, and the extension of a single T_cc fit to bottom and mixed sectors via HQSS. This strengthens the molecular interpretation of T_cc and supplies testable predictions for T_bb and T_bc states.

major comments (1)
  1. [Abstract / fitting procedure] The OBE potential parameters (including the cutoff) are fixed by a single fit to the T_cc^+ lineshape. Higher-lying states lie farther above threshold, so their wave functions sample shorter distances where cutoff regularization dominates. No cutoff variation or stability check is reported for these states, raising the possibility that the reported pole disappearance or shift in Scheme II is regularization-dependent rather than a generic consequence of coupled-channel dynamics. This directly affects the load-bearing claim that explicit coupled channels are required for excited states.

Simulated Author's Rebuttal

1 responses · 0 unresolved

We thank the referee for the detailed and constructive report. The central concern regarding cutoff dependence for higher-lying states is addressed point-by-point below. We agree that additional stability checks will strengthen the manuscript and will incorporate them in the revision.

read point-by-point responses

  1. Referee: [Abstract / fitting procedure] The OBE potential parameters (including the cutoff) are fixed by a single fit to the T_cc^+ lineshape. Higher-lying states lie farther above threshold, so their wave functions sample shorter distances where cutoff regularization dominates. No cutoff variation or stability check is reported for these states, raising the possibility that the reported pole disappearance or shift in Scheme II is regularization-dependent rather than a generic consequence of coupled-channel dynamics. This directly affects the load-bearing claim that explicit coupled channels are required for excited states.

    Authors: We acknowledge the validity of this point: the manuscript does not report an explicit cutoff-variation study for the higher-lying states, and such states are indeed more sensitive to short-distance regularization. While the single fit to the T_cc^+ lineshape constrains the parameters and the Scheme I vs. Scheme II comparison isolates the effect of explicit coupled channels, a dedicated stability analysis is needed to rule out regularization artifacts. In the revised manuscript we will add a cutoff-variation study (varying the cutoff by ±20 % around the fitted value) and tabulate the resulting pole positions for the excited states in both schemes. This will show whether the reported shifts or disappearances remain robust, thereby reinforcing that the differences arise from coupled-channel dynamics rather than the choice of regulator. revision: yes

Circularity Check

0 steps flagged

No significant circularity; derivation is self-contained model comparison

full rationale

The paper explicitly states that OBE potentials are fixed by fitting the T_cc^+ lineshape, then applies the identical fitted interaction in two schemes (single-channel vs. explicit coupled-channel) to other sectors and higher states via HQSS. The central claim—that coupled-channel dynamics alter pole structures for excited states—is obtained by direct numerical comparison of the two schemes on the same input potential, not by any reduction of the output to the fit by construction. No self-citation chains, uniqueness theorems, or ansatze smuggled via prior work appear in the text; the fit is external data and the result is a testable difference between schemes.

Axiom & Free-Parameter Ledger

1 free parameters · 1 axioms · 0 invented entities

The central claim rests on the validity of the OBE model and HQSS assumption, with parameters fitted to one observed state.

free parameters (1)
  • OBE potential parameters
    fixed by fitting the T_cc^+ lineshape
axioms (1)
  • domain assumption Heavy Quark Spin Symmetry (HQSS) allows extension of interactions from low-lying to heavier sectors
    widely use to predict heavy molecules by extending the effective interactions fitted from low-lying states to heavier sectors

pith-pipeline@v0.9.1-grok · 5850 in / 1410 out tokens · 36096 ms · 2026-06-28T17:10:23.507303+00:00 · methodology

discussion (0)

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Reference graph

Works this paper leans on

93 extracted references · 44 linked inside Pith

  1. [1]

    Esposito, A

    A. Esposito, A. Pilloni and A. D. Polosa,Multiquark Resonances,Phys. Rept.668(2017) 1 [1611.07920]

    Pith/arXiv arXiv 2017

  2. [2]

    H.-X. Chen, W. Chen, X. Liu, Y.-R. Liu and S.-L. Zhu,An updated review of the new hadron states,Rept. Prog. Phys.86(2023) 026201 [2204.02649]

    arXiv 2023

  3. [3]

    H.-X. Chen, W. Chen, X. Liu and S.-L. Zhu,The hidden-charm pentaquark and tetraquark states,Phys. Rept.639(2016) 1 [1601.02092]

    Pith/arXiv arXiv 2016

  4. [4]

    F.-K. Guo, C. Hanhart, U.-G. Meißner, Q. Wang, Q. Zhao and B.-S. Zou,Hadronic molecules,Rev. Mod. Phys.90(2018) 015004 [1705.00141]

    Pith/arXiv arXiv 2018

  5. [5]

    L. Meng, B. Wang, G.-J. Wang and S.-L. Zhu,Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules,Phys. Rept.1019(2023) 1 [2204.08716]

    arXiv 2023

  6. [6]

    Bicudo,Tetraquarks and pentaquarks in lattice QCD with light and heavy quarks,Phys

    P. Bicudo,Tetraquarks and pentaquarks in lattice QCD with light and heavy quarks,Phys. Rept.1039(2023) 1 [2212.07793]

    arXiv 2023

  7. [7]

    Li, Z.-F

    N. Li, Z.-F. Sun, X. Liu and S.-L. Zhu,Coupled-channel analysis of the possible D(∗)D(∗), B (∗) B (∗) andD (∗)B (∗) molecular states,Phys. Rev. D88(2013) 114008 [1211.5007]

    Pith/arXiv arXiv 2013

  8. [8]

    Liu, T.-W

    M.-Z. Liu, T.-W. Wu, M. Pavon Valderrama, J.-J. Xie and L.-S. Geng,Heavy-quark spin and flavor symmetry partners of the X(3872) revisited: What can we learn from the one boson exchange model?,Phys. Rev. D99(2019) 094018 [1902.03044]. – 24 –

    Pith/arXiv arXiv 2019

  9. [9]

    Dong, F.-K

    X.-K. Dong, F.-K. Guo and B.-S. Zou,A survey of heavy–heavy hadronic molecules, Commun. Theor. Phys.73(2021) 125201 [2108.02673]

    arXiv 2021

  10. [10]

    L. R. Dai, R. Molina and E. Oset,Prediction of new Tcc states of D*D* and Ds*D* molecular nature,Phys. Rev. D105(2022) 016029 [2110.15270]

    arXiv 2022

  11. [11]

    P. G. Ortega, J. Segovia, D. R. Entem and F. Fernandez,Nature of the doubly-charmed tetraquark Tcc+ in a constituent quark model,Phys. Lett. B841(2023) 137918 [2211.06118]

    arXiv 2023

  12. [12]

    Asanuma, Y

    T. Asanuma, Y. Yamaguchi and M. Harada,Analysis of DD* and D¯(*)Ξcc(*) molecule by one boson exchange model based on heavy quark symmetry,Phys. Rev. D110(2024) 074030 [2311.04695]

    arXiv 2024

  13. [13]

    Albaladejo,Tcc+ coupled channel analysis and predictions,Phys

    M. Albaladejo,Tcc+ coupled channel analysis and predictions,Phys. Lett. B829(2022) 137052 [2110.02944]

    arXiv 2022

  14. [14]

    M.-L. Du, V. Baru, X.-K. Dong, A. Filin, F.-K. Guo, C. Hanhart et al.,Coupled-channel approach to Tcc+ including three-body effects,Phys. Rev. D105(2022) 014024 [2110.13765]

    arXiv 2022

  15. [15]

    J.-L. Lu, M. Song, P. Wang, J.-Y. Guo, G. Li and X. Luo,The bound and resonant states of D(∗)D(∗) andD (∗) ¯D(∗) with the complex scaling method,Eur. Phys. J. C85(2025) 920 [2503.05131]

    arXiv 2025

  16. [16]

    Montesinos, G

    V. Montesinos, G. Montana, M. Albaladejo, J. Nieves and L. Tolos,Melting down a tetraquark:D ∗D(∗) interactions andT cc(3875)+ in a hot environment,2507.13319

    arXiv

  17. [17]

    Bicudo, K

    P. Bicudo, K. Cichy, A. Peters and M. Wagner,BB interactions with static bottom quarks from Lattice QCD,Phys. Rev. D93(2016) 034501 [1510.03441]

    Pith/arXiv arXiv 2016

  18. [18]

    Bicudo, J

    P. Bicudo, J. Scheunert and M. Wagner,Including heavy spin effects in the prediction of a ¯b¯budtetraquark with lattice QCD potentials,Phys. Rev. D95(2017) 034502 [1612.02758]

    Pith/arXiv arXiv 2017

  19. [19]

    T. Aoki, S. Aoki and T. Inoue,Lattice study on a tetraquark state Tbb in the HAL QCD method,Phys. Rev. D108(2023) 054502 [2306.03565]

    arXiv 2023

  20. [20]

    S. H. Lee and S. Yasui,Stable multiquark states with heavy quarks in a diquark model,Eur. Phys. J. C64(2009) 283 [0901.2977]

    Pith/arXiv arXiv 2009

  21. [21]

    W. Chen, T. G. Steele and S.-L. Zhu,Exotic open-flavorbc¯q¯q,bc¯s¯sandqc¯q¯b,sc¯s¯btetraquark states,Phys. Rev. D89(2014) 054037 [1310.8337]

    Pith/arXiv arXiv 2014

  22. [22]

    Karliner and J

    M. Karliner and J. L. Rosner,Discovery of doubly-charmedΞ cc baryon implies a stable (bb¯u¯d) tetraquark,Phys. Rev. Lett.119(2017) 202001 [1707.07666]

    Pith/arXiv arXiv 2017

  23. [23]

    Sakai, L

    S. Sakai, L. Roca and E. Oset,Charm-beauty meson bound states fromB(B ∗)D(D∗)and B(B ∗) ¯D( ¯D∗)interaction,Phys. Rev. D96(2017) 054023 [1704.02196]

    Pith/arXiv arXiv 2017

  24. [24]

    T. F. Caram´ es, J. Vijande and A. Valcarce,Exoticbc¯q¯qfour-quark states,Phys. Rev. D99 (2019) 014006 [1812.08991]

    Pith/arXiv arXiv 2019

  25. [25]

    Richard, A

    J.-M. Richard, A. Valcarce and J. Vijande,Doubly-heavy tetraquark bound states and resonances,Nucl. Part. Phys. Proc.324-329(2023) 64 [2209.07372]

    arXiv 2023

  26. [26]

    Z. Liu, H. Xu and X. Liu,D(*)B¯(*) dynamics in chiral effective field theory,Phys. Rev. D 112(2025) 034007 [2503.10299]

    arXiv 2025

  27. [27]

    Song and D

    Y. Song and D. Jia,Mass spectra of doubly heavy tetraquarks in diquark−antidiquark picture, Commun. Theor. Phys.75(2023) 055201 [2301.00376]. – 25 –

    arXiv 2023

  28. [28]

    L¨ u, D.-Y

    Q.-F. L¨ u, D.-Y. Chen and Y.-B. Dong,Masses of doubly heavy tetraquarksT QQ′ in a relativized quark model,Phys. Rev. D102(2020) 034012 [2006.08087]

    arXiv 2020

  29. [29]

    W. Park, S. Noh and S. H. Lee,Masses of the doubly heavy tetraquarks in a constituent quark model,Nucl. Phys. A983(2019) 1 [1809.05257]

    Pith/arXiv arXiv 2019

  30. [30]

    E. J. Eichten and C. Quigg,Heavy-quark symmetry implies stable heavy tetraquark mesons QiQj ¯qk ¯ql,Phys. Rev. Lett.119(2017) 202002 [1707.09575]

    Pith/arXiv arXiv 2017

  31. [31]

    Ebert, R

    D. Ebert, R. N. Faustov, V. O. Galkin and W. Lucha,Masses of tetraquarks with two heavy quarks in the relativistic quark model,Phys. Rev. D76(2007) 114015 [0706.3853]

    Pith/arXiv arXiv 2007

  32. [32]

    Nieves and M

    J. Nieves and M. P. Valderrama,The Heavy Quark Spin Symmetry Partners of the X(3872), Phys. Rev. D86(2012) 056004 [1204.2790]

    Pith/arXiv arXiv 2012

  33. [33]

    Oset and A

    E. Oset and A. Ramos,Nonperturbative chiral approach to s wave anti-K N interactions, Nucl. Phys. A635(1998) 99 [nucl-th/9711022]

    Pith/arXiv arXiv 1998

  34. [34]

    J. A. Oller and U. G. Meissner,Chiral dynamics in the presence of bound states: Kaon nucleon interactions revisited,Phys. Lett. B500(2001) 263 [hep-ph/0011146]

    Pith/arXiv arXiv 2001

  35. [35]

    D. Jido, J. A. Oller, E. Oset, A. Ramos and U. G. Meissner,Chiral dynamics of the two Lambda(1405) states,Nucl. Phys. A725(2003) 181 [nucl-th/0303062]

    Pith/arXiv arXiv 2003

  36. [36]

    Hyodo and D

    T. Hyodo and D. Jido,The nature of the Lambda(1405) resonance in chiral dynamics,Prog. Part. Nucl. Phys.67(2012) 55 [1104.4474]

    Pith/arXiv arXiv 2012

  37. [37]

    Hidalgo-Duque, J

    C. Hidalgo-Duque, J. Nieves and M. P. Valderrama,Light flavor and heavy quark spin symmetry in heavy meson molecules,Phys. Rev. D87(2013) 076006 [1210.5431]

    Pith/arXiv arXiv 2013

  38. [38]

    F.-K. Guo, C. Hidalgo-Duque, J. Nieves and M. P. Valderrama,Consequences of Heavy Quark Symmetries for Hadronic Molecules,Phys. Rev. D88(2013) 054007 [1303.6608]

    Pith/arXiv arXiv 2013

  39. [39]

    V. Baru, E. Epelbaum, A. A. Filin, C. Hanhart, U.-G. Meißner and A. V. Nefediev, Heavy-quark spin symmetry partners of the X (3872) revisited,Phys. Lett. B763(2016) 20 [1605.09649]

    Pith/arXiv arXiv 2016

  40. [40]

    V. Baru, E. Epelbaum, A. A. Filin, C. Hanhart and A. V. Nefediev,Spin partners of the Z b (10610) and Z b (10650) revisited,JHEP06(2017) 158 [1704.07332]

    Pith/arXiv arXiv 2017

  41. [41]

    Mehen and J

    T. Mehen and J. W. Powell,Heavy Quark Symmetry Predictions for Weakly Bound B-Meson Molecules,Phys. Rev. D84(2011) 114013 [1109.3479]

    Pith/arXiv arXiv 2011

  42. [42]

    Coito,Radially excited axial mesons and the enigmaticZ c andZ b in a coupled-channel model,Phys

    S. Coito,Radially excited axial mesons and the enigmaticZ c andZ b in a coupled-channel model,Phys. Rev. D94(2016) 014016 [1602.07821]

    Pith/arXiv arXiv 2016

  43. [43]

    Ren, G.-J

    Y.-S. Ren, G.-J. Wang, Z. Yang and J.-J. Wu,Investigation on the bottom analogs Tbb- of Tcc+,Phys. Rev. D110(2024) 074007 [2310.09836]

    arXiv 2024

  44. [44]

    Silvestre-Brac and C

    B. Silvestre-Brac and C. Semay,Systematics of L = 0 q-2 anti-q-2 systems,Z. Phys. C57 (1993) 273

    1993

  45. [45]

    Semay and B

    C. Semay and B. Silvestre-Brac,Diquonia and potential models,Z. Phys. C61(1994) 271

    1994

  46. [46]

    Zhang, H

    M. Zhang, H. X. Zhang and Z. Y. Zhang,QQ anti-q anti-q four-quark bound states in chiral SU(3) quark model,Commun. Theor. Phys.50(2008) 437 [0711.1029]

    Pith/arXiv arXiv 2008

  47. [47]

    M.-L. Du, W. Chen, X.-L. Chen and S.-L. Zhu,ExoticQQ¯q¯q,QQ¯q¯sandQQ¯s¯sstates,Phys. Rev. D87(2013) 014003 [1209.5134]. – 26 –

    Pith/arXiv arXiv 2013

  48. [48]

    Francis, R

    A. Francis, R. J. Hudspith, R. Lewis and K. Maltman,Lattice Prediction for Deeply Bound Doubly Heavy Tetraquarks,Phys. Rev. Lett.118(2017) 142001 [1607.05214]

    Pith/arXiv arXiv 2017

  49. [49]

    Junnarkar, N

    P. Junnarkar, N. Mathur and M. Padmanath,Study of doubly heavy tetraquarks in Lattice QCD,Phys. Rev. D99(2019) 034507 [1810.12285]

    Pith/arXiv arXiv 2019

  50. [50]

    Leskovec, S

    L. Leskovec, S. Meinel, M. Pflaumer and M. Wagner,Lattice QCD investigation of a doubly-bottom ¯b¯budtetraquark with quantum numbersI(J P ) = 0(1+),Phys. Rev. D100 (2019) 014503 [1904.04197]

    Pith/arXiv arXiv 2019

  51. [51]

    Cheng, S.-Y

    J.-B. Cheng, S.-Y. Li, Y.-R. Liu, Z.-G. Si and T. Yao,Double-heavy tetraquark states with heavy diquark-antiquark symmetry,Chin. Phys. C45(2021) 043102 [2008.00737]

    arXiv 2021

  52. [52]

    Mohanta and S

    P. Mohanta and S. Basak,Construction ofbb¯u ¯dtetraquark states on lattice with NRQCD bottom and HISQ up and down quarks,Phys. Rev. D102(2020) 094516 [2008.11146]

    arXiv 2020

  53. [53]

    Meng, G.-J

    L. Meng, G.-J. Wang, B. Wang and S.-L. Zhu,Probing the long-range structure of the Tcc+ with the strong and electromagnetic decays,Phys. Rev. D104(2021) 051502 [2107.14784]

    arXiv 2021

  54. [54]

    R. Chen, Q. Huang, X. Liu and S.-L. Zhu,Predicting another doubly charmed molecular resonance Tcc’+ (3876),Phys. Rev. D104(2021) 114042 [2108.01911]

    arXiv 2021

  55. [55]

    Ling, M.-Z

    X.-Z. Ling, M.-Z. Liu, L.-S. Geng, E. Wang and J.-J. Xie,Can we understand the decay width of the Tcc+ state?,Phys. Lett. B826(2022) 136897 [2108.00947]

    arXiv 2022

  56. [56]

    H. Ren, F. Wu and R. Zhu,Hadronic Molecule Interpretation of Tcc+ and Its Beauty Partners,Adv. High Energy Phys.2022(2022) 9103031 [2109.02531]

    arXiv 2022

  57. [57]

    Feijoo, W

    A. Feijoo, W. H. Liang and E. Oset,D0D0π+ mass distribution in the production of the Tcc exotic state,Phys. Rev. D104(2021) 114015 [2108.02730]

    arXiv 2021

  58. [58]

    Yan and M

    M.-J. Yan and M. P. Valderrama,Subleading contributions to the decay width of the Tcc+ tetraquark,Phys. Rev. D105(2022) 014007 [2108.04785]

    arXiv 2022

  59. [59]

    Chen and Y

    X. Chen and Y. Yang,Doubly-heavy tetraquark states and *,Chin. Phys. C46(2022) 054103 [2109.02828]

    arXiv 2022

  60. [60]

    Y. Kim, M. Oka and K. Suzuki,Doubly heavy tetraquarks in a chiral-diquark picture,Phys. Rev. D105(2022) 074021 [2202.06520]

    arXiv 2022

  61. [61]

    R. J. Hudspith and D. Mohler,Exotic tetraquark states with two b¯quarks and JP=0+ and 1+ Bs states in a nonperturbatively tuned lattice NRQCD setup,Phys. Rev. D107(2023) 114510 [2303.17295]

    arXiv 2023

  62. [62]

    Zhang, T.-W

    L.-Y. Zhang, T.-W. Wu and Y.-L. Ma,Bridging doubly heavy tetraquark mass spectrum with heavy baryons utilizing heavy antiquark-diquark symmetry,2508.07236

    arXiv

  63. [63]

    Sakai and Y

    M. Sakai and Y. Yamaguchi,Analysis of bound and resonant states of doubly heavy tetraquarks with spinJ≤2,2503.11134

    arXiv

  64. [64]

    Dong, F.-K

    X.-K. Dong, F.-K. Guo and B.-S. Zou,A survey of heavy-antiheavy hadronic molecules, Progr. Phys.41(2021) 65 [2101.01021]

    arXiv 2021

  65. [65]

    Alexandrou, J

    C. Alexandrou, J. Finkenrath, T. Leontiou, S. Meinel, M. Pflaumer and M. Wagner,Shallow Bound States and Hints for Broad Resonances with Quark Content b¯c¯ud in B-D¯and B*-D¯Scattering from Lattice QCD,Phys. Rev. Lett.132(2024) 151902 [2312.02925]

    arXiv 2024

  66. [66]

    Padmanath, A

    M. Padmanath, A. Radhakrishnan and N. Mathur,Bound Isoscalar Axial-Vector bcu¯d¯ Tetraquark Tbc from Lattice QCD Using Two-Meson and Diquark-Antidiquark Variational Basis,Phys. Rev. Lett.132(2024) 201902 [2307.14128]. – 27 –

    arXiv 2024

  67. [67]

    Meinel, M

    S. Meinel, M. Pflaumer and M. Wagner,Search for b¯b¯us and b¯c¯ud tetraquark bound states using lattice QCD,Phys. Rev. D106(2022) 034507 [2205.13982]

    arXiv 2022

  68. [68]

    A. F. Falk and M. E. Luke,Strong decays of excited heavy mesons in chiral perturbation theory,Phys. Lett. B292(1992) 119 [hep-ph/9206241]

    Pith/arXiv arXiv 1992

  69. [69]

    Cheng, C.-Y

    H.-Y. Cheng, C.-Y. Cheung, G.-L. Lin, Y. C. Lin, T.-M. Yan and H.-L. Yu,Chiral Lagrangians for radiative decays of heavy hadrons,Phys. Rev. D47(1993) 1030 [hep-ph/9209262]

    Pith/arXiv arXiv 1993

  70. [70]

    Casalbuoni, A

    R. Casalbuoni, A. Deandrea, N. Di Bartolomeo, R. Gatto, F. Feruglio and G. Nardulli, Phenomenology of heavy meson chiral Lagrangians,Phys. Rept.281(1997) 145 [hep-ph/9605342]

    Pith/arXiv arXiv 1997

  71. [71]

    Ding,Are Y(4260) and Z+(2) are D(1) D or D(0) D* Hadronic Molecules?,Phys

    G.-J. Ding,Are Y(4260) and Z+(2) are D(1) D or D(0) D* Hadronic Molecules?,Phys. Rev. D79(2009) 014001 [0809.4818]

    Pith/arXiv arXiv 2009

  72. [72]

    Z.-F. Sun, J. He, X. Liu, Z.-G. Luo and S.-L. Zhu,Z b(10610)± andZ b(10650)± as theB ∗ ¯B andB ∗ ¯B∗ molecular states,Phys. Rev. D84(2011) 054002 [1106.2968]. [75]Particle Data Groupcollaboration,Review of Particle Physics,PTEP2022(2022) 083C01. [76]CLEOcollaboration,First measurement of Gamma(D*+),Phys. Rev. Lett.87(2001) 251801 [hep-ex/0108013]. [77]CLE...

    Pith/arXiv arXiv 2011

  73. [73]

    Y.-R. Liu, X. Liu, W.-Z. Deng and S.-L. Zhu,IsX(3872)Really a Molecular State?,Eur. Phys. J. C56(2008) 63 [0801.3540]

    Pith/arXiv arXiv 2008

  74. [74]

    Li and S.-L

    N. Li and S.-L. Zhu,Isospin breaking, Coupled-channel effects and Diagnosis of X(3872), Phys. Rev. D86(2012) 074022 [1207.3954]

    Pith/arXiv arXiv 2012

  75. [75]

    Q. Wang, V. Baru, A. A. Filin, C. Hanhart, A. V. Nefediev and J. L. Wynen,Line shapes of theZ b(10610)andZ b(10650)in the elastic and inelastic channels revisited,Phys. Rev. D98 (2018) 074023 [1805.07453]

    Pith/arXiv arXiv 2018

  76. [76]

    T. Myo, Y. Kikuchi, H. Masui and K. Kat¯ o,Recent development of complex scaling method for many-body resonances and continua in light nuclei,Prog. Part. Nucl. Phys.79(2014) 1 [1410.4356]

    Pith/arXiv arXiv 2014

  77. [77]

    Myo and K

    T. Myo and K. Kato,Complex scaling: Physics of unbound light nuclei and perspective, PTEP2020(2020) 12A101 [2007.12172]

    arXiv 2020

  78. [78]

    Aoyama, T

    S. Aoyama, T. Myo, K. Kat¯ o and K. Ikeda,The complex scaling method for many-body resonances and its applications to three-body resonances,Progress of Theoretical Physics116 (2006) 1

    2006

  79. [79]

    Moiseyev,Quantum theory of resonances: calculating energies, widths and cross-sections by complex scaling,Physics reports302(1998) 212

    N. Moiseyev,Quantum theory of resonances: calculating energies, widths and cross-sections by complex scaling,Physics reports302(1998) 212

    1998

  80. [80]

    Y.-K. Chen, L. Meng, Z.-Y. Lin and S.-L. Zhu,Virtual states in the coupled-channel problems with an improved complex scaling method,2308.12424

    arXiv

Showing first 80 references.