Transverse momentum balance and angular distribution of dijets in Pb + Pb collisions * * Supported by Natural Science Foundation of China (11935007, 11805167)

Abstract

In this study, the production of inclusive b-jet and 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 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-jet in the Pb + Pb collisions at TeV with the experimental data and present the theoretical simulation of the momentum balance of the dijet in the Pb + Pb collisions at TeV along with recent CMS data for the first time. A similar trend to that seen in inclusive dijets is observed in dijets; the distribution of the production shifts to smaller owing to the jet quenching effect. Finally, we report the prediction of the normalized azimuthal angle distribution of the dijet in the Pb + Pb collisions at TeV. The medium-induced energy loss effect of the dijets will generally suppress its production; however, the same side ( region) suffers more energy loss than the far side ( region), thus leading to suppression on the same side and enhancement on the far side in the normalized azimuthal angle distribution in A + A collisions.