European Physical Journal C: Particles and Fields (Feb 2022)

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
https://doi.org/10.1140/epjc/s10052-022-10110-9
Journal volume & issue
Vol. 82, no. 2
pp. 1 – 11

Abstract

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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 ( $$\Delta \eta , \Delta \phi $$ Δ η , Δ ϕ ) 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.