Longitudinal momentum fraction of heavy-flavor mesons in jets in high-energy nuclear collisions

Abstract

Heavy-flavor jets are powerful tools to gain insight into the in-medium partonic energy-loss mechanisms and the quark-gluon plasma's (QGP) transport properties in high-energy nuclear collisions. In this work we present the first theoretical study of the longitudinal momentum fraction $z_{||}$ carried by heavy-flavor mesons in jets in Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV. The p+p baseline is provided by POWHEG+PYTHIA8, which matches the next-to-leading-order hard processes with the parton shower. We employ a Monte Carlo transport model, which considers the collisional and radiative partonic energy loss, to simulate the evolution of heavy-flavor jets in the expanding QGP medium. We observe steeper $z_{||}$ distributions of ${\mathrm{B}}^0$ jets compared to those of ${\mathrm{D}}^0$ jets at the same kinematics region in p+p collisions, which may be a hint of the harder jet fragmentation function of b jets compared to c jets in vacuum. In A+A collisions, it is shown that the jet quenching effect would generally decrease the values of $z_{||}$. We have made a systematical study on how several factors, including jet $p_{\mathrm{T}}$, jet radius $R$, and collision centrality, would influence the medium modification of $z_{||}$ distributions of a ${\mathrm{D}}^0$ jet. In addition, we predict visibly stronger nuclear modifications of ${\mathrm{B}}^0$-jet $z_{||}$ distributions compared to a ${\mathrm{D}}^0$ jet within the same $p_{\mathrm{T}}$ windows as a result of the much steeper initial $z_{||}$ distribution of the ${\mathrm{B}}^0$ jet in vacuum.

12 pages, 7 figures

References in corpus (26)

• An Introduction to PYTHIA 8.2
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Glauber Modeling in High Energy Nuclear Collisions
• Dihadron azimuthal correlations in Au+Au collisions at sqrt(s_NN)=200 GeV
• Nonperturbative Heavy-Quark Diffusion in the Quark-Gluon Plasma
• Observation of $D^0$ meson nuclear modifications in Au+Au collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}$ = 200 GeV
• Radiative and Collisional Jet Energy Loss in the Quark-Gluon Plasma at RHIC
• Medium response in JEWEL and its impact on jet shape observables in heavy ion collisions
• A theory of jet shapes and cross sections: from hadrons to nuclei
• Direct observation of the dead-cone effect in QCD
• Multistage Monte-Carlo simulation of jet modification in a static medium
• The physics of $Z^0/{\gamma }^{\ast }$-tagged jets at the LHC
• First measurement of large area jet transverse momentum spectra in heavy-ion collisions
• Medium modification of $\gamma$-jet fragmentation functions in Pb+Pb collisions at LHC
• QGP modification to single inclusive jets in a calibrated transport model
• The evolving distribution of hard partons traversing a hot strongly interacting plasma
• Data-driven extraction of heavy quark diffusion in quark-gluon plasma
• Studies of charm quark diffusion inside jets using PbPb and pp collisions at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV
• Relativistic Langevin dynamics: charm versus beauty
• Thermal field theory derivation of the source term induced by a fast parton from the quark energy-momentum tensor
• Heavy flavor quenching and flow: the roles of initial condition, pre-equilibrium evolution and in-medium interaction
• Radial profile of bottom quarks in jets in high-energy nuclear collisions
• Probing the in-medium $P_T$-broadening by $\gamma$+HF angular de-correlations
• Measurement of the production of charm jets tagged with ${\mathrm{D}}^0$ mesons in pp collisions at $\sqrt{s}$ = 5.02 and 13 TeV
• $Z^0$ boson associated b-jet production in high-energy nuclear collisions
• Radial distribution of charm quarks in jets in high-energy heavy-ion collisions

Cited by in corpus (5)

• Transverse momentum balance of dijets in Xe+Xe collisions at the LHC
• Probing the mass effect of heavy quark jets in high-energy nuclear collisions
• Phenomenological study of the angle between jet axes in heavy-ion collisions
• The Fox-Wolfram Moment of Jet Production in Relativistic Heavy Ion Collisions
• Production of leptons from decay of heavy-flavor hadrons in high-energy nuclear collisions