具有 q^(t)∼tn 的介质中硬胶子的演化和热化问题

IF 1.1 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS
Felipe Gregoletto Ben, Magno V. T. Machado
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引用次数: 0

摘要

我们通过比较各种横向动量展宽率q^(t)$$ \hat{q}(t) $$$,采用概率微扰方法研究了穿越高密度夸克-胶子等离子体的硬胶子的能量分布。这些结果被应用于解决重离子碰撞中的热化问题。在弱耦合模型中,热化遵循一个 "自下而上 "的过程:早期形成的高能粒子发射低能胶子,导致它们的平衡形成,形成一个热浴,促进高能部门的平衡。在这种情况下,我们将q^(t)$$ \hat{q}(t) $$$的时间依赖性建模为幂律q^(t)∼tn$$ \hat{q}(t)\sim {t}^n $$,并评估n$n$$对穿过介质的硬胶子分布的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evolution of hard gluons in a medium with q ^ ( t ) ∼ t n and the thermalization problem

We study the energy distribution of hard gluons traversing a dense quark-gluon plasma by comparing various transverse momentum broadening rates q ^ ( t ) $$ \hat{q}(t) $$ , using a probabilistic perturbative approach. These results were applied to address the thermalization problem in heavy ion collisions. Within the weak coupling model, thermalization follows a “bottom-up” process: early-formed high-energy partons emit low-energy gluons, leading to their equilibrium formation, creating a thermal bath that facilitates equilibrium in the high-energy sector. Under this scenario, we model the time dependencies of q ^ ( t ) $$ \hat{q}(t) $$ as a power-law q ^ ( t ) t n $$ \hat{q}(t)\sim {t}^n $$ , and assess the impact of n $$ n $$ on the distribution of hard gluons passing through the medium.

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来源期刊
Astronomische Nachrichten
Astronomische Nachrichten 地学天文-天文与天体物理
CiteScore
1.80
自引率
11.10%
发文量
57
审稿时长
4-8 weeks
期刊介绍: Astronomische Nachrichten, founded in 1821 by H. C. Schumacher, is the oldest astronomical journal worldwide still being published. Famous astronomical discoveries and important papers on astronomy and astrophysics published in more than 300 volumes of the journal give an outstanding representation of the progress of astronomical research over the last 180 years. Today, Astronomical Notes/ Astronomische Nachrichten publishes articles in the field of observational and theoretical astrophysics and related topics in solar-system and solar physics. Additional, papers on astronomical instrumentation ground-based and space-based as well as papers about numerical astrophysical techniques and supercomputer modelling are covered. Papers can be completed by short video sequences in the electronic version. Astronomical Notes/ Astronomische Nachrichten also publishes special issues of meeting proceedings.
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