Exploring the effects of electromagnetic fields and tilted bulk distribution on directed flow of D mesons in small systems

被引：5

作者：

Sun, Yifeng ^{[1
,2
]}

Plumari, Salvatore ^{[3
,4
]}

Das, Santosh K. ^{[5
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai Key Lab Particle Phys & Cosmol, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, Key Lab Particle Astrophys & Cosmol MOE, Shanghai 200240, Peoples R China

[3] Univ Catania, Dept Phys & Astron E Majorana, Via S Sofia 64, I-95123 Catania, Italy

[4] INFN LNS, Lab Nazl Sud, Via S Sofia 62, I-95123 Catania, Italy

[5] Indian Inst Technol Goa, Sch Phys Snences, Ponda 403401, Goa, India

来源：

PHYSICS LETTERS B | 2023年 / 843卷

关键词：

Relativistic heavy-ion collisions; Heavy quarks; Langevin equation; Electromagnetic field; Directed flow; Quark-gluon plasma; HEAVY-FLAVOR; NUCLEUS COLLISIONS; PROTON; QUARKS; LHC;

D O I：

10.1016/j.physletb.2023.138043

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We studied the directed flow of heavy quarks in small systems produced in p-Pb collisions due to both the impact of initial vorticity and electromagnetic fields. We employed a relativistic transport code to model the bulk evolution of the small systems and studied the heavy quark momentum evolution using Langevin dynamics. For the heavy quarks interaction with the bulk, we employed a quasiparticle model (QPM). We observed a large directed flow splitting (Av1) of charm quarks due to electromagnetic fields, which is comparable to the directed flow splitting of charm quarks in nucleus-nucleus collisions. However, the magnitude of the directed flow due to the initial tilted matter distribution in p-nucleus collisions is not substantial. The observed directed flow is not rapidity odd due to the asymmetry in the colliding system. The results presented in this manuscript provide an independent way to quantify the initial electromagnetic field produced and the matter distributed in small systems. & COPY; 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons .org /licenses /by /4 .0/). Funded by SCOAP3.

引用

页数：5

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