【摘 要】
：
Angular correlations between a heavy quark (HQ) and its tagged jet are potentially new tools to gain in-sight into the in-medium partonic interactions in relativistic heavy-ion collisions.In this work,we present the first theoretical study on the radial p
【机 构】
：
Key Laboratory of Quark & Lepton Physics (MOE) and Institute of Particle Physics,Central China Norma
论文部分内容阅读
Angular correlations between a heavy quark (HQ) and its tagged jet are potentially new tools to gain in-sight into the in-medium partonic interactions in relativistic heavy-ion collisions.In this work,we present the first theoretical study on the radial profiles of B mesons in jets in Pb+Pb collisions at the Large Hadron Collider (LHC).The initial production of a bottom quark tagged jet in p+p is computed by SHERPA,which matches the next-to-leading order matrix elements with contributions of parton showers,whereas the massive quark traversing the quark-gluon plasma is described by a Monte Carlo model,SHELL,which can simultaneously simulate light and heavy fla-vor in-medium energy loss within the framework of Langevin evolution.In p+p collisions,we find that at lower pTQ the radial profiles of heavy flavors in jets are sensitive to the heavy quark mass.In 0-10％ Pb+Pb collisions at√SNN =5.02 TeV,we observe an inverse modification pattern of the B meson radial profiles in jets at 4 ＜ pTQ ＜ 20 GeV compared to those of D mesons:the jet quenching effects narrow the jet radial profiles of B mesons in jets while broadening those of D mesons in jets.We find that in A+A collisions,the contribution dissipated from the higher pTQ ＞ 20 GeV region naturally has a narrower initial distribution and consequently leads to a narrower modi-fication pattern of the radial profile;however the diffusion nature of the heavy flavor in-medium interactions will give rise to a broader modification pattern of the radial profile.These two effects consequently compete and offset with each other,and the b quarks in jets benefit more from the former and suffer less diffusion effect compared to that of c quarks in jets.These findings can be tested in the future experimental measurements at the LHC to gain bet-ter understanding of the mass effect of jet quenching.
其他文献
The self-consistent mean field approximation of the two-flavor NJL model,with a free parameter α to reflect the competition between the “direct” channel and the “exchange” channel,is employed to study the QCD phase structure at finite isospin chemical pot
Combining the b → sμ+μ-anomaly and dark matter observables,we study the capability of the LHC to test dark matter,Z\',and a vector-like quark.We focus on a local U(1)Lμ-Lr model with a vector-like SU(2)L doublet quark Q and a complex singlet scalar whos
Inspired by the recent discovery of the X(6900) meson in the LHCb experiment,we investigate the in-clusive production rate of the C-odd fully-charmed tetraquarks associated with light hadrons at the B factory within the nonrelativistic QCD (NRQCD) factori
We present a preliminary study of charge exchange heavy ion induced reactions based on the con-strained molecular dynamics(CoMD)model.The purpose is to test the capability of the model in predicting the oc-currence of single charge exchange(SCE)and double
The chiral phase transition and equation of state are studied within a novel self-consistent mean-field ap-proximation of the two-flavor Nambu-Jona-Lasinio model.In this newly developed model,modifications to the chemical μ and chiral chemical μ5 potentia
Three typical Pauli blocking algorithms in quantum molecular dynamics type models are investigated in the nuclear matter,the nucleus,and heavy ion collisions.In nuclear matter,the blocking ratios obtained with the three algorithms are underestimated by 13
Recently,the LHCb Collaboration reported their observation of the first two fully open-flavor tetraquark states named X0(2900) and X1 (2900) with unknown parity.Inspired by the report,we consider all the possible four-quark candidates for X(2900),which in
The inelastic scattering cross section for muons,μ-,with energies E =9-100 eV from the 229Th nuclei is calculated in the framework of the second order of the perturbation theory for quantum electrodynamics.The dom-inant contribution to the excitation of t
A scheme to solve the Hamiltonian in the interacting boson-fermion model in terms of the SU(3)coup-ling basis is introduced,through which the effects of an odd particle on shape phase transitions(SPTs)in odd-A nuc-lei are examined by comparing the critica
Proton capture reactions on Mg isotopes are significant in the Mg-Al cycle in stellar H-burning.In par-ticular,the resonance strengths and branching ratios of low-energy resonances in 25Mg(p,γ)26A1 reactions determine the production of 26Al,which is one o