Radial profile of bottom quarks in jets in high-energy nuclear collisions

Abstract

Angular correlations between heavy quark (HQ) and its tagged jet are potentially new tools to gain insight 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 LHC. The initial production of bottom quark tagged jet in p+p is computed by SHERPA which matches the next-to-leading order matrix elements with contributions of parton shower, whereas the massive quark traversing the QGP described by a Monte Carlo model SHELL which can simultaneously simulate light and heavy flavor in-medium energy loss within the framework of Langevin evolution. In p+p collisions, we find that at lower $p_T^Q$ the radial profiles of heavy flavors in jets are sensitive to the heavy quark mass. In $0-10\%$ Pb+Pb collisions at $\sqrt{{\mathrm{s}}_{\mathrm{NN}}}=5.02$ TeV, we observe an inverse modification pattern of the B mesons radial profiles in jets at $4<{\mathrm{p}}_{\mathrm{T}}^{\mathrm{Q}}<20$ GeV compared to that of D mesons: the jet quenching effects narrow the jet radial profile of B mesons in jets while broaden that of D mesons in jets. We find that in A+A collisions, the contribution dissipated from the higher ${\mathrm{p}}_{\mathrm{T}}^{\mathrm{Q}}>20$ GeV region naturally has a narrower initial distribution and consequently leads to a narrower modification pattern of radial profile; however the diffusion nature of the heavy flavor in-medium interactions will give rise to a broader modification pattern of radial profile. These two effects consequently compete and offset with each other, and the b quarks in jets benefit more from the former and suffers 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 better understanding of the mass effect of jet quenching.

9 pages, 6 figures, a typo corrected

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Cited by in corpus (11)

• Transverse momentum balance of dijets in Xe+Xe collisions at the LHC
• Heavy-Flavour Jets in High-Energy Nuclear Collisions
• Probing the in-medium $P_T$-broadening by $\gamma$+HF angular de-correlations
• Longitudinal momentum fraction of heavy-flavor mesons in jets in high-energy nuclear collisions
• $p_T$ dispersion of inclusive jets in high-energy nuclear collisions
• Langevin dynamics of heavy quarks in a soft-hard factorized approach
• Probing the mass effect of heavy quark jets in high-energy nuclear collisions
• Mass suppression effect in QCD radiation and hadron angular distribution in jet
• Phenomenological study of the angle between jet axes in heavy-ion collisions
• Production of leptons from decay of heavy-flavor hadrons in high-energy nuclear collisions
• D-meson production via sequential hadronization in high-energy nuclear collisions