Jet shape and redistribution of the lost energy from jets in Pb + Pb collisions at the LHC in a multiphase transport model

Ao Luo; Ya-Xian Mao; Guang-You Qin; En-Ke Wang; Han-Zhong Zhang

doi:10.1140/epjc/s10052-022-10110-9

2023 Impact factor 4.2

Particles and Fields

Open Access

Eur. Phys. J. C (2022) 82: 156
https://doi.org/10.1140/epjc/s10052-022-10110-9

Regular Article - Theoretical Physics

Jet shape and redistribution of the lost energy from jets in Pb + Pb collisions at the LHC in a multiphase transport model

Ao Luo¹, Ya-Xian Mao¹, Guang-You Qin¹^c, En-Ke Wang¹^,2^d and Han-Zhong Zhang¹^e

¹ Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, 430079, Wuhan, China
² Guangdong Provincial Key Laboratory of Nuclear Science, Institute of Quantum Matter, South China Normal University, 510006, Guangzhou, China

^c guangyou.qin@mail.ccnu.edu.cn
^d wangek@scnu.edu.cn
^e zhanghz@mail.ccnu.edu.cn

Received: 4 August 2021
Accepted: 7 February 2022
Published online: 18 February 2022

Abstract

Jet-medium interaction involves two important effects: jet energy loss and medium response. The search for jet-induced medium excitations is one of the hot topics in jet quenching study in relativistic nuclear collisions. In this work, we perform a systematic study on how the lost energy from hard jets evolves with the bulk medium and redistributes in the final state of heavy-ion collisions via a multi-phase transport model. In particular, the ( $Δ η, Δ ϕ$ $\Delta \eta , \Delta \phi$ ) distribution of charged particles with respect to the jet axis and jet shape function are studied for various Pb + Pb collision centralities and for different transverse momentum intervals of charged particles. Our numerical result shows a strong enhancement of soft particles at large angles for Pb + Pb collisions relative to p + p collisions at the LHC, qualitatively consistent with recent CMS data. This indicates that a significant fraction of the lost energy from hard jets is carried by soft particles at large angles away from the jet axis.

© The Author(s) 2022

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