arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2603.26288hep-phhep-th
收藏

有限温度下一阶修正在相对论散射中的应用:对暗物质冻结的启示

Finite Temperature NLO Corrections in Relativistic Scatterings: Implications for Dark Matter Freeze-In

Indian Association for the Cultivation of Science(印度科学培养印度协会)

Sampriti Roy, Pritam Sen, Satyanarayan Mukhopadhyay

AI总结:

本文研究了早期宇宙热等离子体中标量粒子相对论性2→2散射过程的下一阶修正,探讨了这些修正对暗物质冻结生产率和湮灭率的影响,发现NLO修正可改变暗物质丰度预测约30%。

摘要:

我们研究了早期宇宙热等离子体中涉及标量粒子的相对论性2→2散射过程的下一阶(NLO)虚拟和热修正。以通过这些散射过程冻结生成标量暗物质对为例,我们评估了NLO修正对湮灭率和暗物质产量的影响。发现仅考虑热质量修正到主导相互作用率可能高估这些率的减少,而完整的NLO修正可使暗物质丰度预测改变约30%。此外,观察到虽然虚拟NLO效应更大,但在相对论 regime 中,矩阵元的有限温度NLO修正可使暗物质丰度改变约10%,与虚拟NLO修正相比。

英文摘要:

We study the next-to-leading order (NLO) virtual and thermal corrections to relativistic $2 \rightarrow 2$ scattering processes involving scalar particles in the early Universe thermal plasma. Taking the example of freeze-in production of scalar dark matter pairs through these scatterings, we evaluate the impact of the NLO corrections to the annihilation rate and the dark matter yield. We find that including only thermal mass corrections to a leading order interaction rate can overestimate the reduction in these rates, and the full NLO corrections can modify the DM abundance predictions by $\mathcal{O}(30\%)$. It is also observed that while the virtual NLO effects are larger, the finite temperature NLO corrections to the matrix elements in the relativistic regime can modify the DM abundance by $\mathcal{O}(10\%)$, in comparison to the virtual NLO corrections.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑