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Phenomenology of Fractionally Charged Particles: Two Reps Are Better Than One

T0 review · 0 major / 5 minor · reviewed 2026-08-06 · deepseek-v4-flash

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Pith's one-line read Two fractionally charged particles can hide at the LHC or reveal themselves with a thousand-fold rate boost.

desk verdict Two-FCP portals genuinely change the search strategy landscape, and the paper is honest about where its numbers depend on the low-charge state being invisible—the qualitative point holds even if the exact contours shift. read the letter →

arxiv 2507.16900 v1 pith:ZV5ACJOV submitted 2025-07-22 hep-ph hep-ex

Seth Koren , Adam Martin This is my paper
classification hep-phhep-ex
keywords fractionallychargedparticleschargequantizationone-formglobalsymmetrygrandunificationcollidersearchesmissingtransverseenergyLHCphenomenologymilliQan
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 paper argues that adding two fractionally charged particles (FCPs) coupled to one Standard Model field, instead of just one, reshapes the collider search landscape in two opposite ways. Opening a decay portal lets a colored FCP decay to Standard Model particles plus a lighter, lower-charge FCP, so the colored particle's mass bound weakens from roughly 1.5 TeV down to about 600-900 GeV. Conversely, the nearly invisible low-charge partner inherits the larger production rate of its heavier partner, which can enlarge its cross section by up to roughly a factor of $10^{3}$. The paper shows, through four benchmark portal models, that the lightest FCP will usually appear together with extra jets or leptons, so exclusive searches miss most of the signal. It therefore motivates inclusive or associated-production searches, and points to the possibility of reanalyzing existing missing-energy datasets for subtle FCP tracks.

What carries the argument

The central objects are 'portal' interactions: single renormalizable operators coupling one Standard Model field to two FCPs, such as the Higgs-fermion coupling $\lambda H \bar{X}_1 X_2$, the Higgs-scalar coupling $\lambda H \phi_2 \phi_1^2$, the lepton Yukawa $y \bar{e}_R P_L X \phi$, and the up-type quark Yukawa $y \bar{u}_R P_L X \phi$. These operators allow heavier FCPs to decay to Standard Model particles plus a lighter, lower-charge FCP, and the mixing angle $\tan(2\alpha) = \sqrt{2}\lambda v/(M_2 - M_1)$ controls which states are produced and how they decay. The machinery converts low-charge species that were only produced feebly through Drell-Yan into particles that inherit large cross sections from strongly or electroweakly produced partners, while destabilizing otherwise stable colored FCPs so their mass limits relax.

What would settle it

A detector simulation or test-beam measurement showing that charge e/6 or e/3 particles are reconstructed as tracks with non-negligible efficiency, or a re-analysis of CMS FCP search events showing that events with three or more energetic tracks are retained, would invalidate the missing-energy reinterpretations and change the quoted mass bounds.

Watch

Extended reading notes

Core claim

The paper establishes that the phenomenology of fractionally charged particles changes qualitatively when a second FCP shares a renormalizable portal interaction with a Standard Model field. In the single-particle case, FCPs only couple to gauge bosons and are effectively stable, giving strong bounds on colored states and weak bounds on hypercharge-only states. With two FCPs, the heavier state can decay to the lighter one plus Standard Model particles, which weakens the constraints on strongly interacting FCPs by factors of a few, while the low-charge, nearly invisible state gains access to much larger production cross sections through its partner. The authors demonstrate this with four portals: a Higgs coupling to a fermion pair, a Higgs coupling to two scalars, a Yukawa coupling to right-handed leptons, and a Yukawa coupling to right-handed up-type quarks. Across these benchmarks, the least visible species (charges e/6 or e/3) can have their discovery potential enhanced by orders of magnitude, and the lightest FCP frequently appears with associated jets or leptons, making inclusive searches essential.

Load-bearing premise

The load-bearing premise is that low-charge FCPs (charge e/6 or e/3, especially e/6) are effectively invisible in LHC detectors, contributing only to missing transverse energy, and that the CMS FCP search rejects events with more than two energetic tracks.

Editorial extensions

If this is right

  • Colored FCP mass bounds can drop from about 1.5 TeV to roughly 600-900 GeV when the colored state can decay to Standard Model particles plus a low-charge FCP.
  • The least visible species, such as charge e/6 particles, can have their inclusive production cross sections boosted by up to about 10^3 through associated production with dileptons or jets.
  • Searches should target FCPs produced together with extra leptons or jets, since the exclusive one- or two-track signature excludes most signal events in these models.
  • Existing missing-energy datasets at the LHC could be re-examined for low-quality tracks with anomalous energy loss, providing discovery potential without new data taking.
  • A discovery of a charge e/6 particle would pin down the global structure of the Standard Model gauge group and its one-form symmetry, ruling out the simplest grand unified theories that predict a smaller quotient.

Reading between the lines

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

  • If the track reconstruction efficiency for charge e/6 or e/3 particles turns out to be higher than assumed, the missing-energy bounds presented here would be replaced by direct track-based limits, which could strengthen rather than weaken the constraints.
  • The same portal logic likely applies to other Standard Model fields, such as left-handed quarks or leptons, down-type quarks, or three-scalar couplings, and may produce a similar pattern of weakened colored bounds and boosted low-charge cross sections.
  • A dedicated detector-level study of low-charge track reconstruction, including hadronization of colored FCPs, would sharpen every bound in the paper and could reveal signatures not captured by simplified assumptions.
  • The 'free' reanalysis strategy of scanning existing missing-energy events for anomalous tracks is a near-term, low-cost experiment that could find FCPs before any new collider search is built.
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Editorial analysis

A structured set of objections, weighed in public.

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

Referee Report

0 major / 5 minor

Summary. The paper studies four minimal two-FCP extensions of the Standard Model, in which a pair of fractionally charged states couples to a single SM field through a Higgs, scalar, lepton, or quark portal. For each benchmark, the authors compute leading-order production cross sections at the 13 TeV LHC and reinterpret existing experimental searches: the CMS low-ionization FCP search, electroweakino and slepton searches with missing transverse energy, jets-plus-MET searches, disappearing-track searches, Higgs invisible-width bounds, and milliQan limits. The central claims are that (i) colored FCPs that can decay to a lighter hypercharge-only FCP are constrained much more weakly than stable colored FCPs, with lower bounds dropping from roughly 1.5 TeV to about 600-900 GeV, and (ii) the production rate of the least-visible, low-charge species can be enhanced by orders of magnitude when they are produced in association with leptons or jets, motivating FCP-plus-jet/lepton searches and reanalysis of existing missing-energy data for low-quality tracks.

Significance. If the results hold, they materially change the phenomenological case for FCP searches at the LHC: the most constrained single-particle representations can be destabilized by a second FCP, while the least constrained species become far more accessible through associated production. The paper is explicit about its main assumptions, particularly that Q/e <= 1/3 particles are effectively invisible in LHC trackers, and it repeatedly flags the absence of full detector simulation. This limitation is real and should be kept in mind when quoting the numerical contours, but it is not an unacknowledged flaw; the cited thesis evidence and the authors' own caveats in Sec. 1.3 and footnotes make the approximate nature of the bounds clear. The qualitative conclusions, especially the need for inclusive and associated-production searches, are robust to plausible variations in track-reconstruction efficiency. The paper is a well-scoped sequel to the authors' previous work, makes concrete use of public experimental data, and provides a clear set of falsifiable predictions, which are strengths for a phenomenological study.

minor comments (5)
  1. [Sec. 1.3 and footnote 1] The numerical contours in Secs. 2.1-2.4 all rest on the statement that Q/e <= 1/3 FCPs are effectively invisible in the tracker, as is explicitly acknowledged; since this is the main source of systematic uncertainty in the quoted mass limits, I suggest collecting the evidence (the cited thesis benchmarks, the pT dependence, and the Q/e = 1/6 case) into a single short paragraph or table so readers can judge the robustness of the bounds at a glance.
  2. [Fig. 2] The caption states that the top two panels and the bottom left panel show Y = 1, but the panel labels are not visible in the figure as typeset; please add explicit panel labels or state the layout more clearly.
  3. [Eq. (2.11)] For the estimate of the branching ratio for t -> X Xbar b W, please state explicitly whether the W is on-shell or virtual and specify the phase-space approximation used in the four-body estimate, since the displayed formula does not show the W propagator dependence.
  4. [Sec. 2.2, footnote 5] The stability argument based on separate Z2 and Z3 selection rules is terse; one additional sentence explaining why phi_2 decays are forbidden in the regime M_phi1 < M_phi2 < 2 M_phi1 would make the discussion self-contained.
  5. [Figs. 5 and 6] The contour labels in the right-hand panels appear garbled in the current typesetting (e.g., '10 2 5 100' and '2 5 10. 100 500'); please ensure the contour levels are legible and consistent with the factor-of-10^2 to 10^3 boost quoted in the abstract.

Circularity Check

0 steps flagged · score 1.0 of 10

No significant circularity; the phenomenology is computed from explicit Lagrangians and compared to independent experimental limits, with the invisibility assumption transparently flagged.

full rationale

The paper's central results are cross-section calculations from explicit Lagrangians (Eqs. 2.1, 2.7, 2.8, 2.10) with model parameters M1, M2, lambda, y, and Y, compared against existing experimental limits from CMS FCP searches [24], electroweakino searches [51,52], disappearing-track searches [53], slepton searches [54], squark searches [57], and milliQan [27]. No parameter is fitted to the target prediction; the claimed 'boost' of up to ~10^3 is an inclusive-to-exclusive production cross-section ratio computed from kinematics, not from the experimental constraints. The reliance on the authors' previous paper [1] is for baseline single-particle bounds and for pedagogical group-theory background; those bounds were independently derived from the same experimental searches and are used as comparison points, not as inputs that force the new results. The treatment of Q/e <= 1/3 states as effectively invisible is an explicitly flagged assumption (Secs. 1.3, 2.1-2.4, footnote 9), not a hidden circular step: it changes which bounds apply, but the cross-section predictions and boost factors are computed independently of that assumption. Similarly, the milliQan 'reverse engineering' is a standard translation of published mass-versus-charge limits into cross-section bounds, not a fit of the model to its own output. The paper repeatedly disclaims precision, calls for full detector simulation, and identifies missing pieces such as hadronization of colored FCPs and track-reconstruction efficiency, indicating that the uncertainties are openly acknowledged rather than disguised as predictions. No derivation reduces by construction to its own inputs, and no load-bearing self-citation chain forces the conclusions. The score of 1 reflects the presence of many non-load-bearing self-citations, not any actual circularity.

Assumptions & free parameters 7 free parameters · 6 assumptions · 4 invented entities

The paper's conclusions rest on standard perturbative calculations and on explicit approximations about detector response; no hidden fitted parameters or ad hoc entities beyond the proposed FCPs are introduced.

free parameters (7)
  • M1 (mass of SU(2)-doublet fermion X1) = scanned up to ~1 TeV
    Chosen by hand to define benchmark spectra in Sec 2.1; bounds are mapped as a function of M1 and M2.
  • M2 (mass of singlet fermion X2) = scanned up to ~1 TeV
    Together with M1 sets mass splittings and decay kinematics; scanned in Sec 2.1.
  • lambda (Higgs portal coupling) = 0.1 and 0.5
    Example values in Sec 2.1; controls mixing angle tan(2α) and decay widths, but qualitative findings are not sensitive to its exact value.
  • Hypercharge Y = 1 and 2
    Selected so that lightest FCP has Q/e = 1/3 or 1/6; defines charge assignments in Secs 2.1-2.2.
  • M_phi and M_X (eR portal masses) = scanned 100-800 GeV
    Scanned in Sec 2.3; the mass hierarchy determines which state decays and the final states.
  • y (portal Yukawa coupling) = not specified; assumed large enough for prompt decays
    Cross-section bounds are independent of y as long as decays are prompt, as noted in Sec 2.3.
  • M_phi and M_X (uR portal masses) = M_phi 600-1400 GeV, M_X 0-1000 GeV
    Scanned in Sec 2.4; determines whether jets+MET or FCP signatures dominate.
assumptions (6)
  • domain assumption The SM gauge group can have global structure GSM_n = (SU(3)xSU(2)xU(1))/Zn, n=1,2,3,6, with electric charges quantized in units of n e/6.
    Invoked in Sec 1.1 as the theoretical basis for FCP charges; sourced to Refs [1,2].
  • domain assumption New fractionally charged states must be Dirac fermions or complex scalars because all chiral SM fermions are known (from Higgs branching ratios).
    Sec 2, second paragraph; restricts model building to vector-like fermions and complex scalars.
  • domain assumption Relic abundances of FCPs are Boltzmann suppressed if the reheating temperature is low; supernova bounds imply Treheat/m < 65.
    Sec 1.2; used to justify that FCPs with m up to ~TeV could exist without overclosing or violating constraints.
  • ad hoc to paper Low-charge FCPs (Q/e <= 1/3) are effectively invisible in LHC trackers, contributing only to missing energy.
    Assumed in Secs 2.1-2.4 for reinterpretation of /ET searches; this is the weakest assumption and is explicitly flagged by the authors.
  • ad hoc to paper The acceptance of the CMS FCP search [24] excludes events with more than two energetic tracks.
    Used in Sec 2.1 to estimate how two-FCP signals evade the search; authors present conservative and optimistic versions.
  • standard math PDF set NNPDF30nlo with alpha_s=0.118 and factorization scale mu_F^2 = s-hat give reliable LO cross sections; higher-order corrections are omitted.
    Sec 2.1, cross-section calculation details; standard choice for LO phenomenology.
invented entities (4)
  • Dirac fermions X1 (SU(2) doublet) and X2 (hypercharge singlet) in the H X1 X2 portal independent evidence
    purpose: Provide a two-FCP model where the heavy doublet decays to the light singlet plus W/Z/h, altering bounds.
    Their charges and production cross sections are specified (Sec 2.1) and are falsifiable at LHC/milliQan.
  • Complex scalars phi1 (singlet) and phi2 (SU(2) doublet) in the H phi2 phi1^2 portal independent evidence
    purpose: Model with a stable or decaying doublet scalar; allows direct three-body production through Higgs.
    Specific charges and decays (Sec 2.2) give testable signatures.
  • Dirac fermion X (singlet) and scalar phi (singlet) in the eR portal independent evidence
    purpose: Couple to right-handed charged leptons; heavier state decays to lepton plus lighter FCP, producing dilepton+MET signatures.
    Sec 2.3 defines charges Q/e = 1/6 and 5/6; production cross sections and decay chains are testable.
  • Colored scalar phi (triplet) and singlet fermion X in the uR portal independent evidence
    purpose: Couple to up-type quarks; colored FCP decays to jets plus light FCP, weakening strong bounds.
    Sec 2.4; predicts jets+MET and boosted XX production, testable with existing LHC data.

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Cite this review

Pith. "Pith review of Phenomenology of Fractionally Charged Particles: Two Reps Are Better Than One." pith.science (2026). https://pith.science/paper/ZV5ACJOV

@misc{pith2026250716900,
  author       = {Pith},
  title        = {Pith review of: Phenomenology of Fractionally Charged Particles: Two Reps Are Better Than One},
  year         = {2026},
  howpublished = {\url{https://pith.science/paper/ZV5ACJOV}},
  note         = {Machine review of arXiv:2507.16900}
}
abstract

We continue our study of fractionally charged particles (FCPs) -- particles carrying electric charge a multiple of $e/6$. Discovering an FCP would inform us about both Standard Model physics (what the true gauge group and the one-form global symmetry are) and Beyond the Standard Model physics (ruling out many unified theories), which makes them a high-stakes target for collider searches. Here we find that with two FCPs there are vastly richer phenomenologies compared to the single-particle extensions we previously studied. Stringent constraints on colored FCPs can be dramatically weakened when decays are open; conversely the cross sections of the least visible species can be enlarged by up to $\sim 10^3$, increasing their discovery potential enormously at the LHC and milliQan. Overall, these simple models motivate performing searches for FCPs produced along with jets or leptons, and highlight 'free' discovery potential in reanalyzing existing missing-energy datasets for low-quality tracks.

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Reference graph

Works this paper leans on

62 extracted references · 22 canonical work pages · cited by 1 Pith paper

  1. [1]

    Koren and A

    S. Koren and A. Martin, Fractionally Charged Particles at the Energy Frontier: The SM Gauge Group and One-Form Global Symmetry , SciPost Phys. 18 (2025) 004, [ 2406.17850]

    arXiv 2025

  2. [2]

    Hucks, Global structure of the standard model, anomalies, and charge quantization , Phys

    J. Hucks, Global structure of the standard model, anomalies, and charge quantization , Phys. Rev. D 43 (1991) 2709–2717

    work page 1991

  3. [3]

    Tong, Line Operators in the Standard Model , JHEP 07 (2017) 104, [ 1705.01853]

    D. Tong, Line Operators in the Standard Model , JHEP 07 (2017) 104, [ 1705.01853]

    arXiv 2017

  4. [4]

    Alonso, D

    R. Alonso, D. Dimakou, and M. West, Fractional-charge hadrons and leptons to tell the Standard Model group apart , Phys. Lett. B 863 (2025) 139354, [ 2404.03438]

    arXiv 2025

  5. [5]

    Li and L.-X

    H.-L. Li and L.-X. Xu, Understanding the SM gauge group from SMEFT , JHEP 07 (2024) 199, [2404.04229]

    arXiv 2024

  6. [6]

    Alonso, D

    R. Alonso, D. Dimakou, Y. Ha, and V. V. Khoze, Charge quantisation, monopoles and emergent symmetry in the Standard Model and its embeddings , 2507.01777

    arXiv

  7. [7]

    Reece, Axion-gauge coupling quantization with a twist , JHEP 10 (2023) 116, [ 2309.03939]

    M. Reece, Axion-gauge coupling quantization with a twist , JHEP 10 (2023) 116, [ 2309.03939]

    arXiv 2023

  8. [8]

    Y. Choi, M. Forslund, H. T. Lam, and S.-H. Shao, Quantization of Axion-Gauge Couplings and Noninvertible Higher Symmetries , Phys. Rev. Lett. 132 (2024), no. 12 121601, [ 2309.03937]

    arXiv 2024

Show all 62 references
  1. [9]

    Cordova, S

    C. Cordova, S. Hong, and L.-T. Wang, Axion domain walls, small instantons, and non-invertible symmetry breaking , JHEP 05 (2024) 325, [ 2309.05636]

    2024 arXiv

  2. [10]

    Cordova and S

    C. Cordova and S. Koren, Higher Flavor Symmetries in the Standard Model , Annalen Phys. 535 (2023), no. 8 2300031, [ 2212.13193]

    2023 arXiv

  3. [11]

    Cordova, S

    C. Cordova, S. Hong, S. Koren, and K. Ohmori, Neutrino Masses from Generalized Symmetry Breaking, Phys. Rev. X 14 (2024), no. 3 031033, [ 2211.07639]

    2024 arXiv

  4. [12]

    Cordova, S

    C. Cordova, S. Hong, and S. Koren, Noninvertible Peccei-Quinn Symmetry and the Massless Quark Solution to the Strong CP Problem , Phys. Rev. X 15 (2025), no. 3 031011, [ 2402.12453]

    2025 arXiv

  5. [13]

    Delgado and S

    A. Delgado and S. Koren, Non-invertible Peccei-Quinn symmetry, natural 2HDM alignment, and the visible axion , JHEP 02 (2025) 178, [ 2412.05362]

    2025 arXiv

  6. [14]

    T. D. Brennan and C. C´ ordova,Axions, higher-groups, and emergent symmetry , JHEP 02 (2022) 145, [ 2011.09600]

    2022 arXiv

  7. [15]

    Cordova and K

    C. Cordova and K. Ohmori, Noninvertible Chiral Symmetry and Exponential Hierarchies , Phys. Rev. X 13 (2023), no. 1 011034, [ 2205.06243]

    2023 arXiv

  8. [16]

    T. D. Brennan, S. Hong, and L.-T. Wang, Coupling a Cosmic String to a TQFT , JHEP 03 (2024) 145, [ 2302.00777]

    2024 arXiv

  9. [17]

    M. M. Anber and E. Poppitz, Nonperturbative effects in the Standard Model with gauged 1-form symmetry, JHEP 12 (2021) 055, [ 2110.02981]. – 22 –

    2021 arXiv

  10. [18]

    Yokokura, Non-invertible symmetries in axion electrodynamics , 2212.05001

    R. Yokokura, Non-invertible symmetries in axion electrodynamics , 2212.05001

    arXiv

  11. [19]

    Y. Choi, H. T. Lam, and S.-H. Shao, Noninvertible Global Symmetries in the Standard Model , Phys. Rev. Lett. 129 (2022), no. 16 161601, [ 2205.05086]

    2022 arXiv

  12. [20]

    Y. Choi, H. T. Lam, and S.-H. Shao, Non-invertible Gauss law and axions , JHEP 09 (2023) 067, [2212.04499]

    2023 arXiv

  13. [21]

    Aloni, E

    D. Aloni, E. Garc ´ ıa-Valdecasas, M. Reece, and M. Suzuki,Spontaneously broken (-1)-form U(1) symmetries, SciPost Phys. 17 (2024), no. 2 031, [ 2402.00117]

    2024 arXiv

  14. [22]

    Putrov and J

    P. Putrov and J. Wang, Categorical symmetry of the standard model from gravitational anomaly, Phys. Rev. D 110 (2024), no. 12 125028, [ 2302.14862]

    2024 arXiv

  15. [23]

    Craig and M

    N. Craig and M. Kongsore, High-quality axions from higher-form symmetries in extra dimensions, Phys. Rev. D 111 (2025), no. 1 015047, [ 2408.10295]

    2025 arXiv

  16. [24]

    Hayrapetyan et al., Search for Fractionally Charged Particles in Proton-Proton Collisions at s=13 TeV , Phys

    CMS Collaboration, A. Hayrapetyan et al., Search for Fractionally Charged Particles in Proton-Proton Collisions at s=13 TeV , Phys. Rev. Lett. 134 (2025), no. 13 131802, [2402.09932]

    2025 arXiv

  17. [25]

    Vannerom, Search for new physics in the dark sector with the CMS detector From invisible to low charge particles

    D. Vannerom, Search for new physics in the dark sector with the CMS detector From invisible to low charge particles. PhD thesis, Brussels U., 2019

    2019

  18. [26]

    Ball et al., Search for millicharged particles in proton-proton collisions at √s = 13 TeV, Phys

    A. Ball et al., Search for millicharged particles in proton-proton collisions at √s = 13 TeV, Phys. Rev. D 102 (2020), no. 3 032002, [ 2005.06518]

    2020

  19. [27]

    Ball et al., Sensitivity to millicharged particles in future proton-proton collisions at the LHC with the milliQan detector , Phys

    milliQan Collaboration, A. Ball et al., Sensitivity to millicharged particles in future proton-proton collisions at the LHC with the milliQan detector , Phys. Rev. D 104 (2021), no. 3 032002, [2104.07151]

    2021 arXiv

  20. [28]

    Galison and A

    P. Galison and A. Manohar, TWO Z’s OR NOT TWO Z’s? , Phys. Lett. B 136 (1984) 279–283

    1984

  21. [29]

    Holdom, Two U(1)’s and Epsilon Charge Shifts , Phys

    B. Holdom, Two U(1)’s and Epsilon Charge Shifts , Phys. Lett. B 166 (1986) 196–198

    1986

  22. [30]

    Holdom, Searching for ϵ Charges and a New U(1) , Phys

    B. Holdom, Searching for ϵ Charges and a New U(1) , Phys. Lett. B 178 (1986) 65–70

    1986

  23. [31]

    R. Foot, H. Lew, and R. R. Volkas, Electric charge quantization , J. Phys. G 19 (1993) 361–372, [hep-ph/9209259]. [Erratum: J.Phys.G 19, 1067 (1993)]

    1993 arXiv

  24. [32]

    L. F. Li and F. Wilczek, Price of Fractionally Charged Particles in a Unified Model , Phys. Lett. B 107 (1981) 64–68

    1981

  25. [33]

    Goldberg, T

    H. Goldberg, T. W. Kephart, and M. T. Vaughn, Fractionally Charged Color Singlet Fermions in a Grand Unified Theory , Phys. Rev. Lett. 47 (1981) 1429

    1981

  26. [34]

    Dong, T.-S

    F.-X. Dong, T.-S. Tu, P.-Y. Xue, and X.-J. Zhou, SU(8) GUT Model With Fractionally Charged Color Singlet Fermions And Low Mass Magnetic Monopoles , Phys. Lett. B 119 (1982) 121–124

    1982

  27. [35]

    P. H. Frampton and T. W. Kephart, Fractionally Charged Particles as Evidence for Supersymmetry, Phys. Rev. Lett. 49 (1982) 1310

    1982

  28. [36]

    Kang and I.-G

    K. Kang and I.-G. Koh, Hypercharge Generators in SU(7) Grand Unification Models , Phys. Rev. D 25 (1982) 1700

    1982

  29. [37]

    Wen and E

    X.-G. Wen and E. Witten, Electric and Magnetic Charges in Superstring Models , Nucl. Phys. B 261 (1985) 651–677. – 23 –

    1985

  30. [38]

    A. N. Schellekens, Electric Charge Quantization in String Theory , Phys. Lett. B 237 (1990) 363–369

    1990

  31. [39]

    Langacker and G

    P. Langacker and G. Steigman, Requiem for an FCHAMP? Fractionally CHArged, Massive Particle, Phys. Rev. D 84 (2011) 065040, [ 1107.3131]

    2011 arXiv

  32. [40]

    Akrami et al., Planck 2018 results

    Planck Collaboration, Y. Akrami et al., Planck 2018 results. X. Constraints on inflation , Astron. Astrophys. 641 (2020) A10, [ 1807.06211]

    2020 arXiv

  33. [41]

    Dunsky, L

    D. Dunsky, L. J. Hall, and K. Harigaya, CHAMP Cosmic Rays , JCAP 07 (2019) 015, [1812.11116]

    2019 arXiv

  34. [42]

    Dunsky, L

    D. Dunsky, L. J. Hall, and K. Harigaya, Higgs Parity, Strong CP, and Dark Matter , JHEP 07 (2019) 016, [ 1902.07726]

    2019 arXiv

  35. [43]

    Craig, The State of Supersymmetry after Run I of the LHC , in Beyond the Standard Model after the first run of the LHC, 9, 2013

    N. Craig, The State of Supersymmetry after Run I of the LHC , in Beyond the Standard Model after the first run of the LHC, 9, 2013. 1309.0528

    2013 arXiv

  36. [44]

    H. Baer, V. Barger, S. Salam, D. Sengupta, and K. Sinha, Status of weak scale supersymmetry after LHC Run 2 and ton-scale noble liquid WIMP searches , Eur. Phys. J. ST 229 (2020), no. 21 3085–3141, [ 2002.03013]

    2020 arXiv

  37. [45]

    Barbieri, A

    R. Barbieri, A. Pomarol, R. Rattazzi, and A. Strumia, Electroweak symmetry breaking after LEP-1 and LEP-2 , Nucl. Phys. B 703 (2004) 127–146, [ hep-ph/0405040]

    2004 arXiv

  38. [46]

    J. D. Wells and Z. Zhang, Effective theories of universal theories , JHEP 01 (2016) 123, [1510.08462]

    2016 arXiv

  39. [47]

    Fuentes-Mart ´ ın, M

    J. Fuentes-Mart ´ ın, M. K¨ onig, J. Pag` es, A. E. Thomsen, and F. Wilsch,A proof of concept for matchete: an automated tool for matching effective theories , Eur. Phys. J. C 83 (2023), no. 7 662, [2212.04510]

    2023 arXiv

  40. [48]

    Navas et al., Review of particle physics , Phys

    Particle Data GroupCollaboration, S. Navas et al., Review of particle physics , Phys. Rev. D 110 (2024), no. 3 030001

    2024

  41. [49]

    R. D. Ball, V. Bertone, S. Carrazza, C. S. Deans, L. Del Debbio, S. Forte, A. Guffanti, N. P. Hartland, J. I. Latorre, and et al., Parton distributions for the lhc run ii , Journal of High Energy Physics 2015 (Apr, 2015)

    2015

  42. [50]

    N. P. Hartland and E. R. Nocera, A mathematica interface to nnpdfs , Nuclear Physics B - Proceedings Supplements 234 (Jan, 2013) 54–57

    2013

  43. [51]

    Hayrapetyan et al., Combined search for electroweak production of winos, binos, higgsinos, and sleptons in proton-proton collisions at s=13 TeV , Phys

    CMS Collaboration, A. Hayrapetyan et al., Combined search for electroweak production of winos, binos, higgsinos, and sleptons in proton-proton collisions at s=13 TeV , Phys. Rev. D 109 (2024), no. 11 112001, [ 2402.01888]

    2024 arXiv

  44. [52]

    Aad et al., Statistical Combination of ATLAS Run 2 Searches for Charginos and Neutralinos at the LHC , Phys

    A TLASCollaboration, G. Aad et al., Statistical Combination of ATLAS Run 2 Searches for Charginos and Neutralinos at the LHC , Phys. Rev. Lett. 133 (2024), no. 3 031802, [2402.08347]

    2024 arXiv

  45. [53]

    Hayrapetyan et al., Search for supersymmetry in final states with disappearing tracks in proton-proton collisions at s=13 TeV , Phys

    CMS Collaboration, A. Hayrapetyan et al., Search for supersymmetry in final states with disappearing tracks in proton-proton collisions at s=13 TeV , Phys. Rev. D 109 (2024), no. 7 072007, [2309.16823]

    2024 arXiv

  46. [54]

    A TLASCollaboration, G. Aad et al., Search for electroweak production of charginos and sleptons decaying into final states with two leptons and missing transverse momentum in – 24 – √s = 13 TeV pp collisions using the ATLAS detector , Eur. Phys. J. C 80 (2020), no. 2 123, [1908.08215]

    2020 arXiv

  47. [55]

    Aad et al., Search for direct stau production in events with two hadronic τ -leptons in √s = 13 TeV pp collisions with the ATLAS detector , Phys

    A TLASCollaboration, G. Aad et al., Search for direct stau production in events with two hadronic τ -leptons in √s = 13 TeV pp collisions with the ATLAS detector , Phys. Rev. D 101 (2020), no. 3 032009, [ 1911.06660]

    2020 arXiv

  48. [56]

    Khachatryan et al., Search for new physics with the M T 2 variable in all-jets final states produced in pp collisions at √s = 13 TeV, JHEP 10 (2016) 006, [1603.04053]

    CMS Collaboration, V. Khachatryan et al., Search for new physics with the M T 2 variable in all-jets final states produced in pp collisions at √s = 13 TeV, JHEP 10 (2016) 006, [1603.04053]

    2016 arXiv

  49. [57]

    CMS Collaboration, T. C. Collaboration et al., Search for supersymmetry in proton-proton collisions at 13 TeV in final states with jets and missing transverse momentum , JHEP 10 (2019) 244, [ 1908.04722]

    2019 arXiv

  50. [58]

    A TLASCollaboration, G. Aad et al., Search for squarks and gluinos in final states with jets and missing transverse momentum using 139 fb −1 of √s =13 TeV pp collision data with the ATLAS detector, JHEP 02 (2021) 143, [ 2010.14293]

    2021 arXiv

  51. [59]

    Borschensky, M

    C. Borschensky, M. Kr¨ amer, A. Kulesza, M. Mangano, S. Padhi, T. Plehn, and X. Portell, Squark and gluino production cross sections in pp collisions at √s = 13, 14, 33 and 100 TeV , Eur. Phys. J. C 74 (2014), no. 12 3174, [ 1407.5066]

    2014 arXiv

  52. [60]

    Beenakker, C

    W. Beenakker, C. Borschensky, M. Kr¨ amer, A. Kulesza, and E. Laenen, NNLL-fast: predictions for coloured supersymmetric particle production at the LHC with threshold and Coulomb resummation, JHEP 12 (2016) 133, [ 1607.07741]

    2016 arXiv

  53. [61]

    Beenakker, R

    W. Beenakker, R. Hopker, M. Spira, and P. M. Zerwas, Squark and gluino production at hadron colliders, Nucl. Phys. B 492 (1997) 51–103, [ hep-ph/9610490]

    1997 arXiv

  54. [62]

    Kulesza and L

    A. Kulesza and L. Motyka, Soft gluon resummation for the production of gluino-gluino and squark-antisquark pairs at the LHC , Phys. Rev. D 80 (2009) 095004, [ 0905.4749]. – 25 –

    2009 arXiv

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