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$p_{T}$ dispersion of inclusive jets in high-energy nuclear collisions

Aug 9, 2022, 2:55 PM
Oral report 重离子物理 Parallel Session I (3):Heavy Ion Physics


Ms jun Yan (Central China Normal University) Dr shiyong chen (Central China Normal University)


In this work, we study the impact of jet quenching on $p_{T}$ dispersion($p_{T}D$) of inclusive jets ($R=0.2$) in Pb+Pb collisions at $\sqrt{s}=2.76$~TeV. The partonic spectrum in the initial hard scattering of elementary collisions are obtained by an event generator POWHEG+PYTHIA, which matches the next-to-leading (NLO) matrix elements with parton showering, and energy loss of fast parton traversing in hot/dense QCD medium is calculated by Monte Carlo simulation within Higher-Twist formalism of jet quenching in heavy-ion collisions. We present the model calculations of normalized $p_{T}D$ distributions for inclusive jets in p+p and Pb+Pb collisions at $\sqrt{s}=2.76$~TeV, which give nice descriptions of ALICE measurements. It is shown that the $p_{T}D$ distributions of inclusive jets in Pb+Pb significantly shifts to higher $p_{T}D$ region relative to that in p+p. Thus the nuclear modification ratio of $p_{T}D$ distributions for inclusive jets is smaller than unity at small $p_{T}D$ region, while larger than one at large $p_{T}D$ region. This behavior results from more uneven $p_T$ distribution of jet constituents as well as the fraction alteration of quark/gluon initiated jets in heavy-ion collisions. The difference of $p_{T}D$ distributions between groomed and ungroomed jets in Pb+Pb collisions are also discussed.

Primary author

Dr shiyong chen (Central China Normal University)


Prof. Ben-Wei Zhang (Central China Normal University) Enke Wang (South China Normal University) Dr Wei Dai (China University of Geosciences) Ms jun Yan (Central China Normal University)

Presentation materials