Study of bottom quark dynamics via non-prompt D^0 and J/ψ in Pb+Pb collisions at √(s_NN)=5.02 TeV

We study bottom quark energy loss via the nuclear modification factor (R_AA) and elliptic flow (v_2) of non-prompt D^0 and J/ψ in relativistic heavy-ion collisions at the LHC. The space-time profile of quark-gluon plasma is obtained from the CLVisc hydrodynamics simulation, the dynamical evolution of heavy quarks inside the color deconfined QCD medium is simulated using a linear Boltzmann transport model that combines Yukawa and string potentials of heavy-quark-medium interactions, the hadronization of heavy quarks is performed using a hybrid coalescence-fragmentation model, and the decay of B mesons is simulated via PYTHIA. Using this numerical framework, we calculate the transverse momentum (p_T) dependent R_AA and v_2 of direct D mesons, B mesons, and non-prompt D^0 and J/ψ from B meson decay in Pb+Pb collisions at √(s_NN)=5.02 TeV. We find the mass hierarchy of the nuclear modification of prompt D and B mesons depends on their p_T. Both R_AA and v_2 of heavy flavor particles show strong p_T and centrality dependences due to the interplay between parton energy loss, medium geometry and flow, and hadronization of heavy quarks. Non-prompt D^0 and J/ψ share similar patterns of R_AA and v_2 to B mesons except for a p_T shift during the decay processes. Therefore, future more precise measurements on non-prompt D^0 and J/ψ can help further pin down the bottom quark dynamics inside the quark-gluon plasma.