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REVIEW 4 major objections 5 minor 150 references

In the minimal left-right symmetric model, a light scalar's loop couplings turn SN1987A gamma-ray data into a bound v_R > 2×10^9 GeV, with future muon and supernova observations reaching 5×10^9 and 6×10^11 GeV.

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2026-08-03 13:11 UTC pith:UN5GWMA2

load-bearing objection Solid recasting paper: the v_R exclusion up to 2e9 GeV is qualitatively believable but quantitatively fragile because the SN1987A gamma-ray argument assumes 100% conversion of H3 decay products into photons. the 4 major comments →

arxiv 2512.25019 v2 pith:UN5GWMA2 submitted 2025-12-31 hep-ph astro-ph.COastro-ph.HEastro-ph.SRhep-ex

Loop-Level Lepton Flavor Violation and Diphoton Signals in the Minimal Left-Right Symmetric Model

Shufang Qiang , Peiwen Wu , Yongchao Zhang This is my paper
classification hep-ph astro-ph.COastro-ph.HEastro-ph.SRhep-ex
keywords left-right symmetric modellepton flavor violationlight scalarright-handed scalesupernova constraintsaxion-like particlesmuon decaydiphoton coupling
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved

The pith

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

In the minimal left-right symmetric model, the neutral scalar H3 that breaks the right-handed gauge symmetry has no direct coupling to standard-model particles, so its only observable effects are loop-generated couplings to charged leptons and photons. This paper argues that if H3 is lighter than about a GeV, those couplings scale like inverse powers of the right-handed breaking scale v_R, making every existing experimental bound on axion-like particles a bound on v_R. Recasting current limits, the authors find that gamma rays from SN1987A already exclude v_R up to 2×10^9 GeV, far beyond the TeV reach of collider searches. They further show that a future high-precision muon experiment could push the reach to 5×10^9 GeV, and a nearby supernova such as Betelgeuse to 6×10^11 GeV, essentially covering the scale needed for non-resonant leptogenesis. The central move is to identify H3 as an axion-like state whose decay constant is v_R, so that the entire ALP constraint program applies directly to the left-right model.

Core claim

With vanishing mixing between H3 and the standard-model Higgs, H3 couples to ordinary matter only at one loop, through diagrams involving the right-handed doubly-charged scalar, the W_R boson, and two right-handed neutrinos whose mass matrix is set by f_R v_R. For order-one Yukawa couplings and maximal RHN mixing, the lepton-flavor-violating couplings c_αβ are controlled by v_R in the same way that axion-like-particle couplings are controlled by the decay constant f_a: the diphoton width scales as m_H3^3/v_R^2, and the LFV decay rates scale as 1/v_R^2 in the relevant limits. In the massless-lepton, massless-photon limit, the production and decay amplitudes of the CP-even H3 coincide with tho

What carries the argument

The central object is H3, the CP-even scalar of the right-handed triplet Δ_R, whose tree-level couplings to standard-model fermions and photons vanish in the no-mixing limit. Its phenomenology is carried entirely by one-loop couplings to charged leptons and photons, all suppressed by powers of v_R, so that v_R acts as the effective decay constant of an axion-like particle. The benchmark assumptions — g_R = g_L, m_H_R^±± = v_R, two right-handed neutrinos with f_1 = 0.5, f_2 = 1.0 and θ = 45° — define the numerical reach. The scalar/pseudoscalar equivalence established in the supplemental material is the load-bearing identity that permits direct translation of ALP constraints onto the (m_H3, v

Load-bearing premise

The whole constraint conversion rests on the assumption that H3's production and decay rates in supernovae and beam dumps are identical to those of a pseudoscalar axion-like particle once lepton and photon masses are neglected; if that equivalence breaks down in the dense, hot supernova plasma, the resulting v_R bounds shift by factors of order one or more.

What would settle it

Compute the exact CP-even scalar production and decay rates in a supernova core, including muon-mass and spin effects, and compare them with the ALP approximation used here; if the H3-to-gamma-ray conversion efficiency differs by more than about a factor of two from the pseudoscalar case, the quoted v_R limits change by the same factor. Alternatively, a future nearby-supernova gamma-ray observation with better sensitivity than SN1987A would directly test the predicted line signal from H3→γγ.

Watch this falsifier — get emailed when new claim-graph text bears on it.

If this is right

  • For a sub-GeV H3 with the assumed benchmark parameters, the minimal LRSM is experimentally excluded for v_R above about 2×10^9 GeV; only a narrow H3 mass window near 100–110 MeV remains partially open because the dominant supernova production channels are kinematically suppressed.
  • A future high-precision muon decay search with sensitivity near 10^-8 to μ→e+invisible would extend the exclusion to v_R ≈ 5×10^9 GeV, roughly a factor of 2.5 above the SN1987A bound.
  • If a nearby supernova like Betelgeuse explodes, gamma-ray observations could probe v_R up to 6×10^11 GeV, reaching the scale needed for non-resonant leptogenesis in this model.
  • These astrophysical and precision bounds exceed the direct LHC limit on the W_R mass by many orders of magnitude, making light-H3 loop signals the dominant experimental test of parity restoration.
  • Because H3 is long-lived for masses below about 1 GeV, laboratory searches must look for displaced vertices and missing-energy signatures; recast beam-dump limits such as those from CHARM and SHiP already cover part of the mass range and set weaker but complementary bounds.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • The scalar/pseudoscalar equivalence is a strong assumption: a dedicated supernova transport calculation using the exact CP-even H3 couplings, including muon-mass effects and the different spin structure relative to a pseudoscalar, could shift the headline v_R bounds by factors of order one or more.
  • Because all H3 couplings scale as inverse powers of v_R, the same ALP-recasting strategy applies to any model with a light scalar coupled to photons or leptons through a heavy loop; the existing ALP constraint industry thus becomes a generic probe of high-scale new physics.
  • The benchmark assumes maximal RHN mixing and order-one Yukawa couplings, which maximize the LFV signal; models with smaller couplings or mixing would see all quoted v_R exclusions degrade roughly linearly with the coupling suppression.
  • Future Tera-Z factories could search for Z→γ+H3→3γ, an independent collider check of the same one-loop H3 couplings, which the paper mentions only in passing.

Editorial analysis

A structured set of objections, weighed in public.

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

Referee Report

4 major / 5 minor

Summary. The paper studies the one-loop couplings of the SU(2)_R-breaking neutral scalar H3 to charged leptons and photons in the minimal left-right symmetric model (LRSM). The authors compute lepton-flavor-violating (LFV) couplings generated by heavy right-handed neutrino mixing, and then recast existing ALP constraints from laboratory searches, beam dumps, and supernova observations onto the H3 scenario. For a benchmark with f1=0.5, f2=1.0, RHN mixing θ=45°, ρ2=0.25, and g_R=g_L, they find that the current most stringent bound comes from SN1987A gamma-ray observations on the H3γγ coupling, excluding the right-handed scale up to v_R ~ 2×10^9 GeV. Future Mu3e data could probe v_R up to ~5×10^9 GeV via µ→e+invisible, and future supernova observations (Betelgeuse, NS mergers) could reach ~6×10^11 GeV.

Significance. If the recasting assumptions hold, this is a striking result: it would show that a minimal LRSM with a light H3 is excluded for v_R values many orders of magnitude above the direct LHC reach, and that upcoming experiments can probe the leptogenesis scale. The paper contains explicit one-loop expressions (Supplemental B), a transparent benchmark setup, and a clear recasting logic. It also honestly flags several simplifications, such as the scalar/pseudoscalar equivalence and the gamma-ray conversion efficiency. Those simplifications, however, are load-bearing for the headline numerical exclusions, so the significance is conditional pending a more quantitative treatment.

major comments (4)
  1. [Diphoton constraints paragraph and Fig. S1] The headline SN1987A(γγ) exclusion of v_R up to 2×10^9 GeV rests on the statement: "For simplicity, we assume all the decay products of H3 convert finally into γ-rays." For m_H3 > 2m_e, H3 decays significantly into e+e− (and into µ+µ− above 2m_µ), as shown in Fig. S1. The e±/µ± pairs must annihilate or radiate to produce the observed gamma rays; the conversion efficiency ε is neither calculated nor bounded. Since the SN1987A signal scales with the number of decay photons, the inferred v_R bound weakens roughly as sqrt(ε). For ε=0.1 the 2×10^9 GeV exclusion drops to ~6×10^8 GeV, close to the LFV limits; for ε=0.01 it falls below 10^8 GeV. Please provide an astrophysical transport estimate for the pair annihilation/photon conversion efficiency, or conservatively apply the gamma-ray recast only in mass regions where H3 decays dominantly to γγ and present the dilepton-dominated regions separ
  2. [Supplemental Material C] The entire ALP-to-H3 recasting relies on the assertion that squared amplitudes for scalar and pseudoscalar H3/a are equal "in the limit of massless photon" and for m_ℓα→0. This is plausible for on-shell two-photon decays and for fully relativistic charged leptons, but the supernova constraints involve Primakoff production with an off-shell virtual photon and photon coalescence in a finite-temperature/density plasma. CP-even and CP-odd couplings can behave differently for off-shell/longitudinal photons. The paper defers the proof to the unpublished follow-up [77]. This is a load-bearing point for the SN1987A, LESNe, and Betelgeuse bounds. Please provide the explicit comparison of the Primakoff and coalescence amplitudes for the scalar versus pseudoscalar case, and quantify the resulting uncertainty on the v_R exclusions.
  3. [Benchmark parameters and LFV constraints] All LFV constraints and prospects in Fig. 2 and Table S1 are computed for a single benchmark: f1=0.5, f2=1.0, θ=45°, ρ2=0.25, g_R=g_L. The text says other benchmark scenarios will be discussed in the unpublished follow-up [77]. The coupling c_{αβ} depends nontrivially on f1, f2, and θ through the RHN mass matrix and the loop functions. Since the µ→e+invisible limit (v_R ≳5×10^8 GeV) and the Mu3e prospect (5×10^9 GeV) are quoted as constraints, please present the analytic scaling of c_{αβ} with f_i and θ, or at least a small grid of representative values, in the paper itself. Without this, the LFV-based numbers are a single point in parameter space and cannot be assessed.
  4. [Main text, LFV constraints (tau decays)] The recasting of CHARM and SHiP bounds from τ→ℓ+a assumes universal ALP couplings to charged leptons and matches H3 and a decay lengths to map the upper boundaries. This is a reasonable first approximation, but the text does not quantify the systematic uncertainty from the different decay modes and lifetimes of a scalar H3 versus a pseudoscalar ALP, especially in the mass region where H3→γγ competes with dilepton modes. Please add a short discussion of the resulting uncertainty on the v_R constraint from beam-dump experiments.
minor comments (5)
  1. [Eq. (S2)] The interference term in Γ(ℓβ→ℓαH3) reads as Re(c(L) c(L)*)√λη, which is just |c(L)|^2 multiplied by an awkward factor. It should likely be Re(c(L) c(R)*)√λη or an analogous interference term; please check the formula.
  2. [Abstract and text] Several typos: 'Yukwa' in the abstract should be 'Yukawa'; 'supervae' should be 'supernovae'; 'an well-motivated' should be 'a well-motivated'; 'long dashed back line' should be 'long dashed black line'.
  3. [Diphoton constraints text] The sentence 'The γ-rays generated from ALP decay from SN1987A and SN2023ixf exclude the coupling g_aγγ up to O(10^{-12}) GeV^{-1}' is confusing: the bound excludes couplings larger than ~10^{-12}, i.e., it constrains g down to that value. Please rephrase to avoid ambiguity.
  4. [Fig. 2 caption] The caption states that current limits are shaded regions and future prospects are lines, but does not fully identify each curve/region (colors, solid vs dashed). A complete legend would help readers verify the numbers in Table S2.
  5. [Tables S1 and S2] The v_R values in the last columns are quoted without uncertainties. Since the underlying ALP limits have astrophysical modeling uncertainties, please state that these are order-of-magnitude estimates, especially for the SN1987A and LESNe entries.

Circularity Check

1 steps flagged

Central ALP-to-H3 recast in the photon channel is delegated to the authors' own unpublished follow-up [77]; the loop couplings and external SN limits are otherwise independent.

specific steps
  1. self citation load bearing [Supplemental Material Section C ('Comparison with couplings of ALPs'), applied in main-text 'Diphoton constraints' section]
    "For both the processes of H3/a ↔ γγ and γ + f → f + H3/a (with the fermion f either relativistic or non-relativistic), the squared amplitudes are the same for scalars and pseudoscalars in the limit of massless photon [77]."

    The headline v_R exclusion (2×10^9 GeV) is obtained by converting external ALP constraints on g_aγγ into constraints on the H3γγ coupling. That conversion requires the scalar/pseudoscalar equivalence for Primakoff production and γγ decay, but the proof is not given here; it is deferred to Ref. [77], a follow-up by the same three authors. The central recast therefore rests on a load-bearing self-citation rather than on an independent derivation within the paper, so the mapping from the external g_aγγ bound to Γ(H3→γγ) ∝ 1/v_R^2 is not independently established in this work.

full rationale

The LFV couplings (Eqs. S11–S19) are computed from the model Lagrangian (Eq. 2) and are not fitted to the observables; the v_R limits from μ→e+inv, τ→ℓ+inv, and the SN1987A LFV channels are external recasts. The headline SN1987A diphoton limit is not derived from the LFV benchmark: Γ(H3→γγ) is given in Eq. S4 and the g_aγγ bound comes from external ALP analyses. Thus the core derivation has substantial independent content. However, the conversion of external ALP limits to H3 in the photon channel is load-bearing and is delegated to the authors' own follow-up Ref. [77] ('the squared amplitudes are the same ... [77]'), with only a brief sketch in Supplemental Material C. This is a self-citation used to bridge the central recast, which raises the score. Separately, the statement 'For simplicity, we assume all the decay products of H3 convert finally into γ-rays' (Diphoton constraints section) is a physical approximation that could weaken the bound if relaxed, but it is an accuracy/robustness limitation rather than circularity. The benchmark choices f1=0.5, f2=1.0, θ=45°, g_R=g_L, and ρ2=0.25 are tunings, not fits to the constrained observables, so they do not constitute fitted-input-called-prediction.

Axiom & Free-Parameter Ledger

4 free parameters · 7 axioms · 0 invented entities

The central limits rest on four benchmark numbers (f1, f2, θ, ρ2) plus neglect of Δ_L and the scalar/pseudoscalar equivalence used to import ALP constraints. No new particles are introduced; H3, RHNs, W_R, and doubly-charged scalars are all pre-existing fields of the minimal LRSM. The diphoton limit driving the headline 2×10^9 GeV exclusion is independent of the LFV benchmark but still depends on the mass relation m_H±±R = vR via ρ2.

free parameters (4)
  • f1 = 0.5 (benchmark)
    Yukawa coupling of H3 to RHN N1; sets m_N1 = f1 vR. Chosen for illustration, not fitted; directly controls the size of the LFV couplings.
  • f2 = 1.0 (benchmark)
    Yukawa coupling of H3 to RHN N2; sets m_N2 = f2 vR. Chosen for illustration; the LFV limits scale with these couplings.
  • RHN mixing angle θ = 45° (π/4)
    Mixing angle between N1 and N2. Set to 45° to maximize the LFV effect, making the quoted LFV limits optimistic.
  • Quartic coupling ρ2 = 0.25
    Chosen so that m_H±±R = sqrt(4ρ2) vR = vR. This mass relation enters the loop functions and the diphoton amplitude.
axioms (7)
  • domain assumption Minimal LRSM gauge group and particle content: SU(3)_C × SU(2)_L × SU(2)_R × U(1)_{B-L} with bidoublet Φ and triplets Δ_L, Δ_R
    The entire calculation assumes this model (Eq. 1).
  • domain assumption Manifest left-right symmetry: g_R = g_L
    Set in the text and used to fix the W_R mass scale. Standard in minimal LRSM.
  • ad hoc to paper Only two RHNs N1, N2 with no CP violation and a single mixing angle θ
    A benchmark simplification adopted in the text; the magnitude of LFV couplings depends on this choice.
  • domain assumption Neglect of Δ_L contributions via D-parity violation
    Text after Eq. (2): 'we neglect the contribution from Δ_L', citing Ref. [75].
  • ad hoc to paper Scalar/pseudoscalar equivalence for ALP-to-H3 recasting
    Supplemental C: cross sections for scalar and pseudoscalar coincide in the massless-lepton/photon limits. This is used to import all ALP constraints.
  • domain assumption The light-H3 scenario (m_H3 ≪ vR) is allowed by the scalar potential
    Borrowed from earlier work Refs. [26,27]; the paper does not re-derive the viability of light H3.
  • domain assumption Supernova and beam-dump modeling in the cited ALP papers is reliable and directly applicable
    Constraints from Refs. [45–50,137,153,155] are taken as exact inputs without re-evaluating the astrophysical modeling.

pith-pipeline@v1.3.0-alltime-deepseek · 27245 in / 19126 out tokens · 187442 ms · 2026-08-03T13:11:39.239731+00:00 · methodology

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read the original abstract

The left-right symmetric model (LRSM) could not only restore parity of the weak interaction, but also provide natural explanations of the tiny active neutrino masses via the seesaw mechanisms. The $SU(2)_R$-breaking scalar $H_3$ can induce lepton flavor violating (LFV) effects in the minimal version of LRSM at the 1-loop order, originating from the mixing of heavy right-handed neutrinos (RHNs). If $H_3$ is light, say below the GeV scale, it will lead to rich signals, e.g. the LFV muon and tauon decays $\ell_\beta \to \ell_\alpha + X$ ($X$ being either visible or invisible final states) and the anomalous supernova signatures. Combined with the diphoton coupling of $H_3$, and recasting the existing constraints onto the light $H_3$ scenario, the right-handed scale $v_R$ is excluded up to $2\times10^9$ GeV. In the future, the $v_R$ scale can be probed up to $5\times10^9$ GeV in high-precision muon experiments, if the Yukwa couplings for RHN masses are of order one and the RHN mixing is maximal, and further up to $6\times10^{11}$ GeV by supernova observations, reaching the non-resonant leptogenesis scale in the LRSM.

Figures

Figures reproduced from arXiv: 2512.25019 by Peiwen Wu, Shufang Qiang, Yongchao Zhang.

Figure 1
Figure 1. Figure 1: FIG. 1. The 1-loop Feynman diagrams for the LFV couplings [PITH_FULL_IMAGE:figures/full_fig_p001_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: FIG. 2. Constraints on [PITH_FULL_IMAGE:figures/full_fig_p003_2.png] view at source ↗

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Reference graph

Works this paper leans on

150 extracted references · 117 linked inside Pith

  1. [3]

    J. C. Pati and A. Salam,Lepton Number as the Fourth Color, Phys. Rev. D10(1974) 275–289. [Erratum: Phys.Rev.D 11, 703–703 (1975)]

    1974

  2. [4]

    R. N. Mohapatra and J. C. Pati,A Natural Left-Right Symmetry, Phys. Rev. D11(1975) 2558

    1975

  3. [5]

    Senjanovic and R

    G. Senjanovic and R. N. Mohapatra,Exact Left-Right Symmetry and Spontaneous Violation of Parity, Phys. Rev. D12(1975) 1502

    1975

  4. [6]

    T. D. Lee and C.-N. Yang,Question of Parity Conservation in Weak Interactions, Phys. Rev.104 (1956) 254–258

    1956

  5. [7]

    C. S. Wu, E. Ambler, R. W. Hayward, D. D. Hoppes, and R. P. Hudson,Experimental Test of Parity Conservation inβDecay, Phys. Rev.105(1957) 1413–1414

    1957

  6. [8]

    Minkowski,µ→eγat a Rate of One Out of10 9 Muon Decays?, Phys

    P. Minkowski,µ→eγat a Rate of One Out of10 9 Muon Decays?, Phys. Lett. B67(1977) 421–428

    1977

  7. [9]

    R. N. Mohapatra and G. Senjanovic,Neutrino Mass and Spontaneous Parity Nonconservation, Phys. Rev. Lett.44(1980) 912

    1980

  8. [10]

    Yanagida,Horizontal gauge symmetry and masses of neutrinos, Conf

    T. Yanagida,Horizontal gauge symmetry and masses of neutrinos, Conf. Proc. C7902131(1979) 95–99

    1979

  9. [11]

    Gell-Mann, P

    M. Gell-Mann, P. Ramond, and R. Slansky,Complex Spinors and Unified Theories, Conf. Proc. C790927 (1979) 315–321, [1306.4669]

    Pith/arXiv arXiv 1979

  10. [12]

    S. L. Glashow,The Future of Elementary Particle Physics, NATO Sci. Ser. B61(1980) 687

    1980

  11. [13]

    R. N. Mohapatra and G. Senjanovic,Neutrino Masses and Mixings in Gauge Models with Spontaneous Parity Violation, Phys. Rev. D23(1981) 165

    1981

  12. [14]

    Magg and C

    M. Magg and C. Wetterich,Neutrino Mass Problem and Gauge Hierarchy, Phys. Lett. B94(1980) 61–64

    1980

  13. [15]

    Schechter and J

    J. Schechter and J. W. F. Valle,Neutrino Masses in SU(2) x U(1) Theories, Phys. Rev. D22(1980) 2227

    1980

  14. [16]

    T. P. Cheng and L.-F. Li,Neutrino Masses, Mixings and Oscillations in SU(2) x U(1) Models of Electroweak Interactions, Phys. Rev. D22(1980) 2860

    1980

  15. [17]

    Lazarides, Q

    G. Lazarides, Q. Shafi, and C. Wetterich,Proton Lifetime and Fermion Masses in an SO(10) Model, Nucl. Phys. B181(1981) 287–300

    1981

  16. [18]

    N. G. Deshpande, J. F. Gunion, B. Kayser, and F. I. Olness,Left-Right Symmetric Electroweak Models with Triplet Higgs, Phys. Rev. D44(1991) 837–858

    1991

  17. [19]

    Zhang, H

    Y. Zhang, H. An, X. Ji, and R. N. Mohapatra,General CP Violation in Minimal Left-Right Symmetric Model and Constraints on the Right-Handed Scale, Nucl. Phys. B802(2008) 247–279, [0712.4218]

    Pith/arXiv arXiv 2008

  18. [20]

    Blanke, A

    M. Blanke, A. J. Buras, K. Gemmler, and T. Heidsieck,Delta F = 2 observables andB→X qγ decays in the Left-Right Model: Higgs particles striking back, JHEP03(2012) 024, [1111.5014]

    Pith/arXiv arXiv 2012

  19. [21]

    Maiezza, M

    A. Maiezza, M. Nemevˇ sek, and F. Nesti,Lepton Number Violation in Higgs Decay at LHC, Phys. Rev. Lett.115(2015) 081802, [1503.06834]

    Pith/arXiv arXiv 2015

  20. [22]

    P. S. B. Dev, R. N. Mohapatra, and Y. Zhang,Probing the Higgs Sector of the Minimal Left-Right Symmetric Model at Future Hadron Colliders, JHEP05(2016) 174, [1602.05947]

    Pith/arXiv arXiv 2016

  21. [23]

    Maiezza, M

    A. Maiezza, M. Nemevˇ sek, and F. Nesti,Perturbativity and mass scales in the minimal left-right symmetric model, Phys. Rev. D94(2016), no. 3 035008, [1603.00360]

    Pith/arXiv arXiv 2016

  22. [24]

    Nemevˇ sek, F

    M. Nemevˇ sek, F. Nesti, and J. C. Vasquez,Majorana Higgses at colliders, JHEP04(2017) 114, [1612.06840]

    Pith/arXiv arXiv 2017

  23. [25]

    Maiezza, G

    A. Maiezza, G. Senjanovi´ c, and J. C. Vasquez,Higgs sector of the minimal left-right symmetric theory, Phys. Rev. D95(2017), no. 9 095004, [1612.09146]

    Pith/arXiv arXiv 2017

  24. [26]

    P. S. Bhupal Dev, R. N. Mohapatra, and Y. Zhang, Displaced photon signal from a possible light scalar in minimal left-right seesaw model, Phys. Rev. D95 (2017), no. 11 115001, [1612.09587]

    Pith/arXiv arXiv 2017

  25. [27]

    P. S. B. Dev, R. N. Mohapatra, and Y. Zhang,Long 6 Lived Light Scalars as Probe of Low Scale Seesaw Models, Nucl. Phys. B923(2017) 179–221, [1703.02471]

    Pith/arXiv arXiv 2017

  26. [28]

    P. S. Bhupal Dev, R. N. Mohapatra, and Y. Zhang, Probing TeV scale origin of neutrino mass at future lepton colliders via neutral and doubly-charged scalars, Phys. Rev. D98(2018), no. 7 075028, [1803.11167]

    Pith/arXiv arXiv 2018

  27. [29]

    P. S. Bhupal Dev, R. N. Mohapatra, W. Rodejohann, and X.-J. Xu,Vacuum structure of the left-right symmetric model, JHEP02(2019) 154, [1811.06869]

    Pith/arXiv arXiv 2019

  28. [30]

    Chauhan, P

    G. Chauhan, P. S. B. Dev, R. N. Mohapatra, and Y. Zhang,Perturbativity constraints onU(1) B−L and left-right models and implications for heavy gauge boson searches, JHEP01(2019) 208, [1811.08789]

    Pith/arXiv arXiv 2019

  29. [31]

    Chauhan,Vacuum Stability and Symmetry Breaking in Left-Right Symmetric Model, JHEP12(2019) 137, [1907.07153]

    G. Chauhan,Vacuum Stability and Symmetry Breaking in Left-Right Symmetric Model, JHEP12(2019) 137, [1907.07153]

    Pith/arXiv arXiv 2019

  30. [32]

    Brdar, L

    V. Brdar, L. Graf, A. J. Helmboldt, and X.-J. Xu, Gravitational Waves as a Probe of Left-Right Symmetry Breaking, JCAP12(2019) 027, [1909.02018]

    Pith/arXiv arXiv 2019

  31. [33]

    Li, Q.-S

    M. Li, Q.-S. Yan, Y. Zhang, and Z. Zhao,Prospects of gravitational waves in the minimal left-right symmetric model, JHEP03(2021) 267, [2012.13686]

    Pith/arXiv arXiv 2021

  32. [34]

    Borah and A

    D. Borah and A. Dasgupta,Probing left-right symmetry via gravitational waves from domain walls, Phys. Rev. D106(2022), no. 3 035016, [2205.12220]

    Pith/arXiv arXiv 2022

  33. [35]

    Z. A. Borboruah and U. A. Yajnik,Left-right symmetry breaking and gravitational waves: A tale of two phase transitions, Phys. Rev. D110(2024), no. 4 043016, [2212.05829]

    Pith/arXiv arXiv 2024

  34. [36]

    Kriewald, M

    J. Kriewald, M. Nemevˇ sek, and F. Nesti,Enabling precise predictions for left-right symmetry at colliders, Eur. Phys. J. C84(2024), no. 12 1306, [2403.07756]

    Pith/arXiv arXiv 2024

  35. [37]

    Wang, Q.-S

    D.-W. Wang, Q.-S. Yan, and M. Huang,Bubble wall velocity and gravitational wave in the minimal left-right symmetric model, Phys. Rev. D110(2024), no. 7 076011, [2405.01949]

    Pith/arXiv arXiv 2024

  36. [38]

    P. S. B. Dev, J. Heeck, and A. Thapa,Decaying scalar dark matter in the minimal left-right symmetric model, Phys. Rev. D112(2025), no. 1 015004, [2501.14669]

    Pith/arXiv arXiv 2025

  37. [39]

    Searle, C

    W. Searle, C. Bal´ azs, Y. Xiao, and Y. Zhang,Machine learning left-right breaking from gravitational waves, JCAP11(2025) 034, [2506.09319]. [40]TWIST Collaboration, R. Bayes et al.,Search for two body muon decay signals, Phys. Rev. D91(2015), no. 5 052020, [1409.0638]. [41]PIENU Collaboration, A. Aguilar-Arevalo et al., Improved search for two body muon ...

    Pith/arXiv arXiv 2025

  38. [42]

    Jodidio et al.,Search for Right-Handed Currents in Muon Decay, Phys

    A. Jodidio et al.,Search for Right-Handed Currents in Muon Decay, Phys. Rev. D34(1986) 1967. [Erratum: Phys.Rev.D 37, 237 (1988)]. [43]Belle Collaboration, K. Uno et al.,Search for lepton-flavor-violating tau decays toℓαat Belle, 2503.22195

    Pith/arXiv arXiv 1986

  39. [44]

    Y. Ema, P. J. Fox, M. Hostert, T. Menzo, M. Pospelov, A. Ray, and J. Zupan,Long-lived Axion-Like Particles from Tau Decays,2507.15271

    Pith/arXiv arXiv

  40. [45]

    Li and Z

    Y. Li and Z. Liu,Supernova constraints on lepton flavor violating ALPs,2501.12075

    arXiv

  41. [46]

    Huang and Z

    Z.-M. Huang and Z. Liu,Low-Energy Supernova Constraints on Lepton Flavor Violating Axions, 2506.16922

    arXiv

  42. [47]

    Huang, C

    Z.-M. Huang, C. Li, and Z. Liu,Refined Low-Energy Supernova Constraints on Lepton Flavor Violating Axions,2510.22523

    arXiv

  43. [48]

    M¨ uller, F

    E. M¨ uller, F. Calore, P. Carenza, C. Eckner, and M. C. D. Marsh,Investigating the gamma-ray burst from decaying MeV-scale axion-like particles produced in supernova explosions, JCAP07(2023) 056, [2304.01060]

    Pith/arXiv arXiv 2023

  44. [49]

    M¨ uller, P

    E. M¨ uller, P. Carenza, C. Eckner, and A. Goobar, Constraining MeV-scale axionlike particles with Fermi-LAT observations of SN 2023ixf, Phys. Rev. D 109(2024), no. 2 023018, [2306.16397]

    Pith/arXiv arXiv 2024

  45. [50]

    D. F. G. Fiorillo, T. Pitik, and E. Vitagliano,Energy Transfer by Feebly Interacting Particles in Supernovae: The Trapping Regime, Phys. Rev. Lett.135(2025), no. 7 071005, [2503.13653]. [51]A TLAS Collaboration, G. Aadet al.,Search for heavy Majorana or Dirac neutrinos and right-handed W gauge bosons in final states with charged leptons and jets in pp col...

    arXiv 2025

  46. [53]

    Cirigliano, A

    V. Cirigliano, A. Kurylov, M. J. Ramsey-Musolf, and P. Vogel,Lepton flavor violation without supersymmetry, Phys. Rev. D70(2004) 075007, [hep-ph/0404233]

    Pith/arXiv arXiv 2004

  47. [54]

    Cirigliano, A

    V. Cirigliano, A. Kurylov, M. J. Ramsey-Musolf, and P. Vogel,Neutrinoless double beta decay and lepton flavor violation, Phys. Rev. Lett.93(2004) 231802, [hep-ph/0406199]

    Pith/arXiv arXiv 2004

  48. [55]

    Tello, M

    V. Tello, M. Nemevsek, F. Nesti, G. Senjanovic, and F. Vissani,Left-Right Symmetry: from LHC to Neutrinoless Double Beta Decay, Phys. Rev. Lett.106 (2011) 151801, [1011.3522]

    Pith/arXiv arXiv 2011

  49. [56]

    Nemevsek, F

    M. Nemevsek, F. Nesti, G. Senjanovic, and V. Tello, Neutrinoless Double Beta Decay: Low Left-Right Symmetry Scale?,1112.3061

    Pith/arXiv arXiv

  50. [57]

    S. P. Das, F. F. Deppisch, O. Kittel, and J. W. F. Valle,Heavy Neutrinos and Lepton Flavour Violation in Left-Right Symmetric Models at the LHC, Phys. Rev. D86(2012) 055006, [1206.0256]

    Pith/arXiv arXiv 2012

  51. [58]

    Barry and W

    J. Barry and W. Rodejohann,Lepton number and flavour violation in TeV-scale left-right symmetric theories with large left-right mixing, JHEP09(2013) 153, [1303.6324]

    Pith/arXiv arXiv 2013

  52. [59]

    C.-H. Lee, P. S. Bhupal Dev, and R. N. Mohapatra, Natural TeV-scale left-right seesaw mechanism for neutrinos and experimental tests, Phys. Rev. D88 (2013), no. 9 093010, [1309.0774]

    Pith/arXiv arXiv 2013

  53. [60]

    F. F. Deppisch, T. E. Gonzalo, S. Patra, N. Sahu, and U. Sarkar,Double beta decay, lepton flavor violation, and collider signatures of left-right symmetric models with spontaneousD-parity breaking, Phys. Rev. D91 (2015), no. 1 015018, [1410.6427]

    Pith/arXiv arXiv 2015

  54. [61]

    Bambhaniya, P

    G. Bambhaniya, P. S. B. Dev, S. Goswami, and M. Mitra,The Scalar Triplet Contribution to Lepton Flavour Violation and Neutrinoless Double Beta Decay in Left-Right Symmetric Model, JHEP04(2016) 046, [1512.00440]

    Pith/arXiv arXiv 2016

  55. [62]

    Borah and A

    D. Borah and A. Dasgupta,Charged lepton flavour 7 violcxmation and neutrinoless double beta decay in left-right symmetric models with type I+II seesaw, JHEP07(2016) 022, [1606.00378]

    Pith/arXiv arXiv 2016

  56. [63]

    Bonilla, M

    C. Bonilla, M. E. Krauss, T. Opferkuch, and W. Porod,Perspectives for Detecting Lepton Flavour Violation in Left-Right Symmetric Models, JHEP03 (2017) 027, [1611.07025]

    Pith/arXiv arXiv 2017

  57. [64]

    P. S. Bhupal Dev and Y. Zhang,Displaced vertex signatures of doubly charged scalars in the type-II seesaw and its left-right extensions, JHEP10(2018) 199, [1808.00943]

    Pith/arXiv arXiv 2018

  58. [65]

    G. F. S. Alves, C. S. Fong, L. P. S. Leal, and R. Z. Funchal,Exploring the Neutrino Sector of the Minimal Left-Right Symmetric Model,2208.07378

    Pith/arXiv arXiv

  59. [66]

    Alonso, M

    R. Alonso, M. Dhen, M. B. Gavela, and T. Hambye, Muon conversion to electron in nuclei in type-I seesaw models, JHEP01(2013) 118, [1209.2679]

    Pith/arXiv arXiv 2013

  60. [67]

    D. N. Dinh, A. Ibarra, E. Molinaro, and S. T. Petcov, Theµ−eConversion in Nuclei,µ→eγ, µ→3e Decays and TeV Scale See-Saw Scenarios of Neutrino Mass Generation, JHEP08(2012) 125, [1205.4671]. [Erratum: JHEP 09, 023 (2013)]

    Pith/arXiv arXiv 2012

  61. [68]

    Keung and G

    W.-Y. Keung and G. Senjanovic,Majorana Neutrinos and the Production of the Right-handed Charged Gauge Boson, Phys. Rev. Lett.50(1983) 1427

    1983

  62. [69]

    A. G. Akeroyd, M. Aoki, and Y. Okada,Lepton Flavour Violating tau Decays in the Left-Right Symmetric Model, Phys. Rev. D76(2007) 013004, [hep-ph/0610344]

    Pith/arXiv arXiv 2007

  63. [70]

    J. A. Aguilar-Saavedra, F. Deppisch, O. Kittel, and J. W. F. Valle,Flavour in heavy neutrino searches at the LHC, Phys. Rev. D85(2012) 091301, [1203.5998]

    Pith/arXiv arXiv 2012

  64. [71]

    R. L. Awasthi, M. K. Parida, and S. Patra,Neutrino masses, dominant neutrinoless double beta decay, and observable lepton flavor violation in left-right models and SO(10) grand unification with low massW R, ZR bosons, JHEP08(2013) 122, [1302.0672]

    Pith/arXiv arXiv 2013

  65. [72]

    Lindner, M

    M. Lindner, M. Platscher, and F. S. Queiroz,A Call for New Physics : The Muon Anomalous Magnetic Moment and Lepton Flavor Violation, Phys. Rept.731 (2018) 1–82, [1610.06587]

    Pith/arXiv arXiv 2018

  66. [73]

    A. Das, P. S. B. Dev, and R. N. Mohapatra,Same Sign versus Opposite Sign Dileptons as a Probe of Low Scale Seesaw Mechanisms, Phys. Rev. D97(2018), no. 1 015018, [1709.06553]

    Pith/arXiv arXiv 2018

  67. [74]

    Roitgrund and G

    A. Roitgrund and G. Eilam,Search for like-sign dileptons plus two jets signal in the framework of the manifest left-right symmetric model, JHEP01(2021) 031, [1704.07772]. [Erratum: JHEP 03, 029 (2021)]

    Pith/arXiv arXiv 2021

  68. [75]

    Chang, R

    D. Chang, R. N. Mohapatra, and M. K. Parida, Decoupling Parity and SU(2)-R Breaking Scales: A New Approach to Left-Right Symmetric Models, Phys. Rev. Lett.52(1984) 1072

    1984

  69. [76]

    Hahn and M

    T. Hahn and M. Perez-Victoria,Automatized one loop calculations in four-dimensions and D-dimensions, Comput. Phys. Commun.118(1999) 153–165, [hep-ph/9807565]

    Pith/arXiv arXiv 1999

  70. [77]

    Qiang, P

    S. Qiang, P. Wu, and Y. Zhang,1-loop phenomenology of lightsu(2) r-breaking scalar in the minimal left-right symmetric model,

  71. [78]

    P. S. B. Dev, R. N. Mohapatra, and Y. Zhang,Lepton Flavor Violation Induced by a Neutral Scalar at Future Lepton Colliders, Phys. Rev. Lett.120(2018), no. 22 221804, [1711.08430]

    Pith/arXiv arXiv 2018

  72. [79]

    Escribano and A

    P. Escribano and A. Vicente,Ultralight scalars in leptonic observables, JHEP03(2021) 240, [2008.01099]

    Pith/arXiv arXiv 2021

  73. [80]

    Calibbi, D

    L. Calibbi, D. Redigolo, R. Ziegler, and J. Zupan, Looking forward to lepton-flavor-violating ALPs, JHEP 09(2021) 173, [2006.04795]

    Pith/arXiv arXiv 2021

  74. [81]

    Bauer, M

    M. Bauer, M. Neubert, S. Renner, M. Schnubel, and A. Thamm,Flavor probes of axion-like particles, JHEP 09(2022) 056, [2110.10698]

    Pith/arXiv arXiv 2022

  75. [82]

    Cheung, A

    K. Cheung, A. Soffer, Z. S. Wang, and Y.-H. Wu, Probing charged lepton flavor violation with axion-like particles at Belle II, JHEP11(2021) 218, [2108.11094]

    Pith/arXiv arXiv 2021

  76. [83]

    Davidson, B

    S. Davidson, B. Echenard, R. H. Bernstein, J. Heeck, and D. G. Hitlin,Charged Lepton Flavor Violation, 2209.00142

    Pith/arXiv arXiv

  77. [84]

    C. Han, M. L. L´ opez-Ib´ a˜ nez, A. Melis, O. Vives, and J. M. Yang,Anomaly-free leptophilic axionlike particle and its flavor violating tests, Phys. Rev. D103(2021), no. 3 035028, [2007.08834]

    Pith/arXiv arXiv 2021

  78. [85]

    C. Han, M. L. L´ opez-Ib´ a˜ nez, A. Melis,´O. Vives, and J. M. Yang,Anomaly-free ALP from non-Abelian flavor symmetry, JHEP08(2022) 306, [2203.16376]

    Pith/arXiv arXiv 2022

  79. [86]

    Ma,Polarization and Correlation Effects in Lepton Flavor Violated Decays Induced by Axion-Like Particle,2104.11162

    K. Ma,Polarization and Correlation Effects in Lepton Flavor Violated Decays Induced by Axion-Like Particle,2104.11162

    Pith/arXiv arXiv

  80. [87]

    C.-X. Cui, H. Ishida, S. Matsuzaki, and Y. Shigekami, Probing an intrinsically flavorful ALP via tau-lepton flavor physics, Phys. Rev. D105(2022), no. 9 095033, [2110.11640]

    Pith/arXiv arXiv 2022

Showing first 80 references.