Heavy And Light Jet Quenching In Different Collision Systems At The LHC Energies

Quark-gluon plasma(QGP)created in the Relativistic Heavy Ion Collider(RHIC)and the Large Hadron Collider(LHC)has offered great opportunities to study strong interaction matter under extreme conditions of temperature and density.As a energetic parton passes through QGP medium,it will violently interact with the medium and lose energy.That is known as jet quenching.Jet quenching leads to suppression of yield of high pT hadrons,which is important evidence for formation of QGP in ultrarelativistic heavy-ion collisions.The suppression effect has been observed in large collision systems,such as Au-Au,Pb-Pb and Xe-Xe systems.However,it has not been observed in minimum bias(MB)d-Au,p-Pb collisions.Futhermore,recent experiments have observed large anisotropic collective flows in high multiplicity proton-lead collisions at the LHC,which indicates the possible formation of mini QGP in small collision systems.The intriguing result between RAA and flow suggests the suppression effect of RAA's may be masked by the event average in MB p-Pb collisions.The system size scan have been proposed to to bridge the gap between large and small systems.With similar multiplicities and smaller fluctuations comparing with p-Pb system,the forthcoming experiment of colliding light nucleus at LHC can offer great opportunities to study the system size dependence of the jet observables.Many models have been developed to simulate the evolution of parton's motion in QGP.In this dissertation,we use a linearized Boltzmann transport model,combined with hydrodynamics simulation,to describe energetic parton's transport in hot and dense medium.In LBT model,the collisional energy loss caused by jet-medium interaction is described by leading-order perturbative QCD(pQCD);the radiation spectrum of the medium induced gluons is given by Higher-Twist formalism.The hydrodynamical profile is generated by(3+1)-D-CLVsic model with the smooth initial condition given by TRENTo model.We use next-to-leading-order framework to calculate differential cross section for hard partons.Using our state-of-the-art jet quenching model,we study the nuclear modification factors(RAA's)for charged hadrons,D0,B± mesons within 8<pT<325GeV,and the D0,D±,B±decayed electrons(positrons)within 5<pT<37.5GeV,in Pb-Pb collisions at(?)and Xe-Xe collisions at(?)central and mid-central collisions.We further predict the transverse momentum and centrality dependences of RAA's for these particles in Ar-Ar collisions at(?)and O-O collisions at(?).For different collision systems with the same centrality,we found that RAA increases with the descrerasing number of the participated nucleons(Npaxt).For the systems with the same(Nart>,the RAA's of these systems may be different due to different(?)and initial geometry conditions.We also found that the RAA are getting close to unity with the decreasing system size.