科研之友
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摘要
In this study,the production of inclusive b-jet and bb dijets in Pb+Pb collisions has been investigated by considering the in-medium evolution of heavy and light quarks simultaneously.The initial hard processes of inclusive b-jet and bb dijets production are described using a next-to-leading order (NLO) plus parton shower Monte Carlo(MC) event generator,SHERPA,which can be well matched with the experimental data in p+p collisions.The framework uses the Langevin transport model to describe the evolution of the bottom quark.Furthermore,the collisional energy loss and higher-twist description are considered to determine the radiative energy loss from both the bottom and light quarks.We compare the theoretical simulation of the inclusive jet and b-jetRAAin the Pb+Pb collisions at (SNN)1/2=2.76 TeV ith the experimental data and present the theoretical simulation of the momentum balance of the bb dijet in the Pb+Pb collisions at5.02Te V along with recent CMS data for the first time.A similar trend to that seen in inclusive dijets is observed in bb dijets;the distribution of the production shifts to smaller xJ owing to the jet quenching effect.Finally,we report the prediction of the normalized azimuthal angle distribution of the bb dijet in the Pb+Pb collisions at5.02Te V.The medium-induced energy loss effect of the bb dijets will generally suppress its production;however,the same side (??→0region) suffers more energy loss than the far side (??→πregion),thus leading to suppression on the same side and enhancement on the far side in the normalized azimuthal angle distribution in A+A collisions.collisions.
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