Unraveling the Energy-Energy Correlators for Heavy Flavor Tagged Jets in pp, p+Pb and Pb+Pb Collisions

TL;DR

This paper investigates how energy-energy correlator distributions for heavy flavor tagged jets vary across different collision systems, revealing medium-induced modifications and jet broadening effects in heavy-ion collisions.

Contribution

It provides the first detailed analysis of EEC distributions for heavy flavor tagged jets in pp, p+Pb, and Pb+Pb collisions, highlighting medium effects on jet structure.

Findings

EEC distributions shift towards larger RL in A+A collisions.

Jet quenching increases particle multiplicity per jet.

Energy redistribution within jets is observed in heavy-ion environments.

Abstract

In this study, energy-energy correlator (EEC) distributions for the $\rm D^0$, $\rm B^0$-tagged, inclusive, and the PYTHIA generated pure quark jets are computed in pp, p+Pb, and Pb+Pb collisions at \sqrts =5.02 TeV for a same jet transverse momentum interval 15-30 GeV. We find the number of particles per jet determines the height of the EEC distribution in pp baseline. The averaged energy weight distribution resulted in a shift of the originally larger angular distributed particle distribution to a smaller RL, thereby obtaining an EEC distribution. The EEC distributions for all quark-tagged jets in A+A exhibit a noticeable shift towards larger RL region, suggesting that the jets will be more widely distributed compared to those in pp collisions. The jet quenching effect will cause the pair angular distribution to shift towards larger values and increase the number of particles per jet. This redistribution of energy within the jets suggests that the already reduced jet energy is redistributed among a larger number of particles, leading to a reduced energy weight per pair. The enhancement of the number of particles per jet and the reduced averaged energy weight interplay with each other to form the medium modification of EEC.