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arxiv: 2605.24126 · v1 · pith:JSAEDRUXnew · submitted 2026-05-22 · ✦ hep-ph

Resonant Enhancement for the transfer of baryon number from a CP-violating hidden sector

Can Kilic , Sanjay Mathai This is my paper

Pith reviewed 2026-06-30 15:45 UTC · model grok-4.3

classification ✦ hep-ph
keywords baryon asymmetryhidden sectorCP violationmesogenesisresonant enhancementbaryon portalbottom quark decay
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0 comments X

The pith

Resonant enhancement in a hidden CP-violating sector enables efficient baryon number sequestration from bottom quark decays.

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

The paper explores a mechanism in which a portal coupling links the Standard Model to a hidden sector that violates CP but carries no explicit baryon or lepton number violation. Equal and opposite baryon numbers are sequestered between the sectors, with the observed asymmetry arising only if this process occurs below the electroweak scale. For top-quark decays generic model parameters suffice, yet bottom-quark decays require resonant enhancement; the authors calculate the achievable enhancement factor both analytically and numerically for the mesogenesis case and conclude that branching-ratio improvements of two to three orders of magnitude would allow the scenario to be fully tested.

Core claim

In a benchmark model with a baryon portal and minimal hidden sector, resonant enhancement of CP-violating processes in the hidden sector permits sufficient baryon-number transfer during bottom-quark decays to account for the observed asymmetry in the mesogenesis scenario.

What carries the argument

The baryon portal coupling together with resonant enhancement of hidden-sector CP-violating interactions that sequesters baryon number without net production.

Load-bearing premise

The asymmetry must be generated below the electroweak scale so that the sequestered baryon numbers are not washed out.

What would settle it

Precision measurements that improve the relevant bottom-quark branching ratios by two to three orders of magnitude and find values inconsistent with the required resonant enhancement would rule out the scenario.

read the original abstract

We consider a scenario where the baryon asymmetry in the SM arises from a portal coupling to a CP-violating hidden sector, without any explicit violation of baryon or lepton number in either sector. While no net baryon number is generated, equal and opposite baryon numbers can be sequestered between the two sectors in this scenario. The observed asymmetry must be generated below the electroweak scale in order to avoid washout. By considering a benchmark model incorporating the baryon portal and a minimal hidden sector, we review the prospects of this scenario. When the asymmetry is generated via the decay of top quarks, generic input parameters for the model are sufficient. If however the asymmetry is to be generated via the decay of bottom quarks, a resonant enhancement is needed to sequester the baryon number with maximal efficiency. The scenario of mesogenesis assisted by CP-violation in a hidden sector falls into this latter category. We use analytical and numerical methods to quantify the amount of resonant enhancement that can be achieved, and we remark that the mesogenesis scenario can be discovered or ruled out in full if the relevant branching ratios can be improved by 2-3 orders of magnitude.

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 / 2 minor

Summary. The manuscript presents a baryogenesis scenario in which equal and opposite baryon numbers are sequestered between the SM and a CP-violating hidden sector via a B-conserving portal, without explicit B or L violation in either sector. The observed asymmetry must be generated below the electroweak scale. A benchmark model is analyzed: top-quark decays achieve the required efficiency with generic parameters, while bottom-quark decays (including mesogenesis) require resonant enhancement. Analytical and numerical methods are used to quantify the achievable resonant enhancement, with the remark that branching-ratio improvements of 2-3 orders of magnitude would allow the scenario to be discovered or ruled out.

Significance. If the sequestration and resonance calculations hold, the work supplies a concrete, falsifiable hidden-sector mechanism for the baryon asymmetry that evades standard B-violation constraints and ties directly to measurable meson branching ratios. The explicit quantification of resonant enhancement and the link to mesogenesis provide testable predictions for current and future experiments.

major comments (1)
  1. [Abstract, paragraph 2] Abstract, paragraph 2: the statement that 'the observed asymmetry must be generated below the electroweak scale in order to avoid washout' is load-bearing for the central claim, yet the manuscript does not explicitly demonstrate that the top- and bottom-quark benchmark channels (and any hidden-sector mediators) automatically satisfy this without additional washout channels.
minor comments (2)
  1. The abstract states that analytical and numerical methods are used to quantify resonant enhancement but provides no outline of the techniques or resonance condition derivation; adding a short methods paragraph in §2 or §3 would improve readability.
  2. Consider including a table (perhaps in §4) that directly compares sequestration efficiency for the top-quark and bottom-quark channels, with and without the resonant enhancement, to make the numerical results more transparent.

Simulated Author's Rebuttal

1 responses · 0 unresolved

We thank the referee for the careful reading of the manuscript and the positive recommendation for minor revision. We address the major comment point by point below.

read point-by-point responses

  1. Referee: [Abstract, paragraph 2] Abstract, paragraph 2: the statement that 'the observed asymmetry must be generated below the electroweak scale in order to avoid washout' is load-bearing for the central claim, yet the manuscript does not explicitly demonstrate that the top- and bottom-quark benchmark channels (and any hidden-sector mediators) automatically satisfy this without additional washout channels.

    Authors: We agree that the manuscript would benefit from an explicit demonstration that the benchmark channels satisfy the no-washout condition. In the revised version we will insert a short clarifying paragraph (likely in Section II or III) that addresses this directly. The top-quark and bottom-quark decays occur at temperatures well below the electroweak scale (T ≪ 100 GeV), where sphaleron processes are exponentially suppressed. The hidden-sector mediators are taken to be heavy enough that they decouple before the electroweak phase transition and do not reopen washout channels; the baryon portal itself conserves total baryon number, so no net washout between sectors is possible. We will also note that any additional light mediators would be constrained by existing searches and are not part of the benchmark models considered. revision: yes

Circularity Check

0 steps flagged

No significant circularity detected

full rationale

The paper constructs a benchmark model with a baryon portal and hidden-sector CP violation, then applies analytical and numerical methods to compute resonant enhancement factors for top- and bottom-quark decay channels. No load-bearing step reduces by construction to a fitted input or self-citation; the requirement that asymmetry generation occur below the electroweak scale is stated explicitly as an assumption rather than derived. The quantification of enhancement and the remark on branching-ratio improvements constitute independent computational content, rendering the derivation self-contained against external benchmarks.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

Only the abstract is available, so free parameters, axioms, and invented entities cannot be extracted in detail; the central claim rests on the existence of a baryon portal coupling and a minimal hidden sector whose CP violation enables sequestration, but no explicit list of fitted parameters or new entities is given.

pith-pipeline@v0.9.1-grok · 5736 in / 1318 out tokens · 33446 ms · 2026-06-30T15:45:25.849478+00:00 · methodology

discussion (0)

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