超外围重离子碰撞中重合粒子产生的建模

IF 5.3 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review D Pub Date : 2025-09-29 DOI:10.1103/jhsz-6wnv

L. A. Harland-Lang

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引用次数: 0

摘要

本文分析了超外围重离子碰撞中重合粒子的产生。特别是，我们提出了与μ子对产生相关的重合ρ0介子产生的第一个详细和微分预测，这是由最近ATLAS测量这一过程引起的。这些被发现很好地描述了数据，包括重合分数对零度量热计选择和/或其他对μ子的运动学约束的依赖。提出了不同运动变量水平上的微分预测，并在循环MC发电机中公开提供了计算。我们还提出了双光子同步引发的一般结果，重点是介子和电子对的产生；前者受到相当大的抑制，而后者将在阈值处无处不在。此外，还讨论了超外围测量中重合产生对排他性否决的影响。

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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Modeling coincident particle production in ultraperipheral heavy ion collisions

In this paper, we present an analysis of coincident particle production in ultraperipheral heavy ion collisions. In particular, we present the first detailed and differential predictions for coincident ρ0 meson production in association with muon pair production, motivated by the recent ATLAS measurement of this process. These are found to describe the data very well, including the dependence of the coincidence fraction on the zero degree calorimeter selection and/or other kinematic constraints on the muons. Differential predictions at the level of various kinematic variables are presented, and the calculation is made publicly available in the uperhic MC generator. We also present general results for coincident two-photon-initiated production focusing on muon and electron pair production; while the former is rather suppressed, the latter will be ubiquitous at threshold. The impact of coincident production on exclusivity vetoes in ultraperipheral measurements is in addition discussed.

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来源期刊

Physical Review D 物理-天文与天体物理

CiteScore

9.20

自引率

36.00%

发文量

审稿时长

2 months

期刊介绍： Physical Review D (PRD) is a leading journal in elementary particle physics, field theory, gravitation, and cosmology and is one of the top-cited journals in high-energy physics. PRD covers experimental and theoretical results in all aspects of particle physics, field theory, gravitation and cosmology, including: Particle physics experiments, Electroweak interactions, Strong interactions, Lattice field theories, lattice QCD, Beyond the standard model physics, Phenomenological aspects of field theory, general methods, Gravity, cosmology, cosmic rays, Astrophysics and astroparticle physics, General relativity, Formal aspects of field theory, field theory in curved space, String theory, quantum gravity, gauge/gravity duality.