Leptogenesis with perturbations in type-II and type-III seesaw models

IF 4.2 2区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS

The European Physical Journal C Pub Date : 2025-05-14 DOI:10.1140/epjc/s10052-025-14277-9

Iason Baldes

引用次数: 0

Abstract

Density perturbations have recently been shown to lead to a novel effect in the freeze-out of heavy particles called “acoustically driven freeze-out.” This leads to an enhancement in the yield in standard leptogenesis. We extend this calculation to include \(2 \rightarrow 2\) washout processes in type-I leptogenesis and the Sommerfeld-enhanced \(2 \rightarrow 2\) gauge annihilations in type-II and type-III leptogenesis. These CP conserving gauge annihilations suppress the yield of heavy particles sourcing the asymmetry. We show the acoustically driven freeze-out leads to novel enhancements in the baryon asymmetry in type-II and type-III leptogenesis, already in the weak washout regime, in contrast with type-I leptogenesis.

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ii型和iii型跷跷板模型中具有扰动的轻生

最近有研究表明，密度扰动会导致重粒子的冻结产生一种新的效应，这种效应被称为“声学驱动的冻结”。这导致了在标准纤体发生中产量的提高。我们将这一计算扩展到包括i型纤毛虫发生中的\(2 \rightarrow 2\)冲洗过程和ii型和iii型纤毛虫发生中的sommerfeld增强的\(2 \rightarrow 2\)规范湮灭。这些CP守恒规范湮灭抑制了产生不对称的重粒子的产率。我们表明，与i型纤生相比，声学驱动的冻结导致ii型和iii型纤生中重子不对称性的新增强，已经处于弱水洗状态。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

The European Physical Journal C 物理-物理：粒子与场物理

CiteScore

8.10

自引率

15.90%

发文量

1008

审稿时长

2-4 weeks

期刊介绍： Experimental Physics I: Accelerator Based High-Energy Physics Hadron and lepton collider physics Lepton-nucleon scattering High-energy nuclear reactions Standard model precision tests Search for new physics beyond the standard model Heavy flavour physics Neutrino properties Particle detector developments Computational methods and analysis tools Experimental Physics II: Astroparticle Physics Dark matter searches High-energy cosmic rays Double beta decay Long baseline neutrino experiments Neutrino astronomy Axions and other weakly interacting light particles Gravitational waves and observational cosmology Particle detector developments Computational methods and analysis tools Theoretical Physics I: Phenomenology of the Standard Model and Beyond Electroweak interactions Quantum chromo dynamics Heavy quark physics and quark flavour mixing Neutrino physics Phenomenology of astro- and cosmoparticle physics Meson spectroscopy and non-perturbative QCD Low-energy effective field theories Lattice field theory High temperature QCD and heavy ion physics Phenomenology of supersymmetric extensions of the SM Phenomenology of non-supersymmetric extensions of the SM Model building and alternative models of electroweak symmetry breaking Flavour physics beyond the SM Computational algorithms and tools...etc.