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arxiv: 2605.31357 · v1 · pith:5VP5AN26new · submitted 2026-05-29 · ✦ hep-ph

Signals of New Resonances from Di-Lepton Non-Universality in the Bottomonium Mass Region at the Large Hadron Collider

Connor Houghton , Amit Lath , Joseph Reichert , Scott Thomas This is my paper

Pith reviewed 2026-06-28 21:50 UTC · model grok-4.3

classification ✦ hep-ph
keywords di-lepton non-universalitybottomoniumLHCnew resonanceschirality-violating couplingsscalar bosonspseudoscalar bosonsdi-tau decays
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The pith

Spin-zero scalar or pseudoscalar bosons with chirality-violating couplings can produce large di-lepton non-universality in the bottomonium mass region at the LHC.

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

The paper classifies new physics models that feature narrow boson resonances produced via strong interactions in proton-proton collisions and decaying preferentially to tau pairs. It focuses on spin-zero scalar or pseudoscalar bosons whose chirality-violating couplings to fermions allow substantial differences between electron, muon, and tau pair production rates around bottomonium masses, reaching cross sections of many hundreds of nanobarns. At electron-positron colliders the same couplings suppress di-electron effects due to mass suppression, preserving apparent universality. The authors argue that comparing integrated resonant di-electron, di-muon, and di-tau spectra at the LHC could reveal either new resonances with enhanced tau decays or bottomonium states with non-Standard-Model decay patterns.

Core claim

Universality classes of models with narrow resonances produced through strongly interacting initial states and enhanced di-tau decays include spin-zero scalar or pseudoscalar bosons carrying chirality-violating fermion couplings; these bosons can generate up to hundreds of nanobarns of direct production cross section and visible di-lepton non-universality in the bottomonium mass region at the LHC, while mass-suppressed couplings maintain di-lepton universality to high precision in the same region at electron-positron colliders.

What carries the argument

Chirality-violating couplings of spin-zero scalar or pseudoscalar bosons that enhance decays to di-tau final states while allowing strong-interaction production in proton-proton collisions.

If this is right

  • Simultaneous comparison of di-electron, di-muon, and di-tau spectra at the LHC can test for new resonances with enhanced di-tau branching fractions.
  • Bottomonium states themselves could exhibit non-Standard-Model enhanced di-tau decay modes detectable in the same mass region.
  • Mass-suppressed chirality-violating couplings ensure that electron-positron colliders see no corresponding non-universality in di-electron channels.
  • The production cross sections reach hundreds of nanobarns when the resonances couple strongly to initial-state partons.

Where Pith is reading between the lines

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

  • Similar non-universality signals could appear in other quarkonium or resonance regions if the same coupling pattern holds at different masses.
  • Dedicated trigger strategies at the LHC focused on tau-pair resonances near known bottomonium states would be needed to exploit the predicted cross sections.
  • Absence of signals would constrain the allowed range of chirality-violating couplings for any new spin-zero states below a few tens of GeV.

Load-bearing premise

Narrow resonances with the specified chirality-violating couplings and strong production mechanisms exist in the bottomonium mass region and remain consistent with all existing collider and other constraints.

What would settle it

Equal integrated resonant prompt di-electron, di-muon, and di-tau mass spectra measured at the LHC in the bottomonium region would indicate the absence of such new bosons or non-Standard-Model enhanced bottomonium decays.

Figures

Figures reproduced from arXiv: 2605.31357 by Amit Lath, Connor Houghton, Joseph Reichert, Scott Thomas.

Figure 1
Figure 1. Figure 1: Branching ratios of a spin-zero scalar ϕ or pseudoscalar ϖ boson of mass mϕ,ϖ = 10 GeV in type II Two-Higgs Doublet Mixing Models in the alignment limit as a function of tan β. The decay branching ratios of a spin-zero scalar or pseudoscalar boson in the alignment limit of the 2HDMM sub-class of ultraviolet completions is independent of mixing ampli￾tudes since all partial decay widths are proportional to … view at source ↗
Figure 2
Figure 2. Figure 2: Total inclusive production cross section divided by mixing amplitude squared [PITH_FULL_IMAGE:figures/full_fig_p017_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: Total inclusive production cross section times di-tau branching ratio times ac [PITH_FULL_IMAGE:figures/full_fig_p018_3.png] view at source ↗
read the original abstract

Universality classes of new physics models featuring narrow boson resonances produced through strongly interacting initial states in proton-proton collisions and with enhanced decays to di-tau final states are classified. Spin-zero scalar or pseudoscalar bosons with chirality-violating fermion couplings can induce potentially significant di-lepton non-universality in the bottomonium mass region, with up to many hundreds of nanobarns of direct production total cross section in proton-proton collisions at the Large Hadron Collider. Conversely, mass suppressed chirality-violating couplings of spin-zero bosons to di-electrons maintain di-lepton universality to a high degree in the same mass region at electron-positron colliders. Simultaneous measurement and comparison of integrated resonant prompt di-electron, di-muon, and di-tau mass spectra at the Large Hadron Collider in the bottomonium mass region could be sensitive to the existence of new boson resonances with enhanced di-tau decays, or likewise bottomonium states with non-Standard Model enhanced di-tau decay modes.

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

0 major / 2 minor

Summary. The manuscript classifies universality classes of new-physics models containing narrow spin-zero boson resonances that are produced via strong interactions in pp collisions and decay preferentially to di-tau. It shows that chirality-violating couplings of scalar or pseudoscalar bosons can generate observable di-lepton non-universality (e, μ, τ) in the bottomonium mass region at the LHC, with direct-production cross sections reaching hundreds of nanobarns, while the same couplings remain mass-suppressed for electrons and thus preserve universality at e+e− colliders. The authors propose that simultaneous measurements of prompt di-electron, di-muon, and di-tau invariant-mass spectra at the LHC could be sensitive to such resonances or to non-Standard-Model enhancements in bottomonium di-tau decays.

Significance. If the model classification and the mapping from coupling structure to collider signatures are correct, the work supplies a concrete, falsifiable search strategy that exploits lepton non-universality in a mass window already accessible at the LHC. The conditional nature of the claim (existence of the resonances is not asserted) keeps the result from being overstated, while the reported cross-section scale, if substantiated by explicit calculations, would constitute a striking phenomenological result.

minor comments (2)
  1. The abstract states cross sections “up to many hundreds of nanobarns”; the corresponding section deriving or estimating these values should be cross-referenced explicitly so readers can trace the numerical result.
  2. Notation for the universality classes (e.g., any shorthand labels or table summarizing the classes) would benefit from a compact summary table or diagram to improve readability.

Simulated Author's Rebuttal

0 responses · 0 unresolved

We thank the referee for their positive assessment of the manuscript, accurate summary of its content, and recommendation for minor revision. The significance statement is appreciated. No specific major comments were provided in the report.

Circularity Check

0 steps flagged

No significant circularity

full rationale

The paper classifies universality classes of new-physics models featuring narrow spin-zero resonances produced via strong interactions and decaying preferentially to di-tau, then maps coupling structures to collider signatures at the LHC versus e+e- machines. No equations, fitted parameters, or self-citations appear in the provided abstract or description that reduce any central claim to an input by construction. The strongest claim is explicitly conditional on the existence of such resonances rather than derived from data fits or prior author results invoked as uniqueness theorems. The derivation chain is therefore self-contained as a model-classification exercise with no load-bearing circular steps.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

Abstract provides no explicit free parameters, axioms, or invented entities; insufficient detail available for enumeration.

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discussion (0)

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Reference graph

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