Nucleosynthesis and CMB bounds on photophilic ALPs: a fresh look

IF 4.8 2区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS

The European Physical Journal C Pub Date : 2026-05-09 DOI:10.1140/epjc/s10052-026-15544-z

Miguel Escudero Abenza, Clara Garcia-Perez, Maksym Ovchynnikov

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引用次数: 0

Abstract

We provide a fresh look at the cosmological constraints on axion-like particles (ALPs) that couple predominantly to photons, focusing on lifetimes \(\tau _{a} \lesssim 10^{4}\, \textrm{s}\) and masses \(m_a\lesssim 10\,\textrm{GeV}\). We consider Big Bang nucleosynthesis (BBN) and Cosmic Microwave Background (CMB) bounds and explore how these limits depend upon the unknown reheating temperature of the Universe, \(T_\textrm{reh}\). Compared with some previous studies, we account for the rare decays of these ALPs into light hadrons and show that this leads to extended constraints for several reheating temperatures. Our limits are cast in a model-independent way, and we identify regions of parameter space where these ALPs could alleviate small tensions in the determinations of \(N_\textrm{eff}\) and the deuterium abundance. Our Mathematica BBN code BBNEasyALP is publicly available at .

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亲光性ALPs上的核合成和CMB结合：新观察

我们对主要与光子耦合的类轴子粒子（ALPs）的宇宙学约束提供了新的视角，重点关注寿命\(\tau _{a} \lesssim 10^{4}\, \textrm{s}\)和质量\(m_a\lesssim 10\,\textrm{GeV}\)。我们考虑大爆炸核合成（BBN）和宇宙微波背景（CMB）边界，并探索这些极限如何依赖于未知的宇宙再加热温度\(T_\textrm{reh}\)。与以前的一些研究相比，我们解释了这些阿尔卑斯山罕见的衰变为轻强子，并表明这导致了几个再加热温度的扩展约束。我们的限制以模型独立的方式进行，我们确定了参数空间的区域，在这些区域中，这些ALPs可以减轻\(N_\textrm{eff}\)和氘丰度测定中的小张力。我们的Mathematica BBN代码BBNEasyALP是公开的。

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.