Studies of Charm Quark Diffusion inside Jets Using Pb-Pb and pp Collisions at root s(NN)=5.02 TeV

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Aşilar, Ece and Md. Ali, Mohd. Adli (2020) Studies of Charm Quark Diffusion inside Jets Using Pb-Pb and pp Collisions at root s(NN)=5.02 TeV. Physical Review Letters, 125 (10). pp. 1-18. ISSN 0031-9007 E-ISSN 1079-7114

	PDF (The CMS Project) - Published Version Restricted to Repository staff only Download (541kB) | Request a copy
Preview	PDF (Scopus) - Supplemental Material Download (148kB) | Preview
	PDF (wos) - Supplemental Material Restricted to Repository staff only Download (184kB) | Request a copy

Abstract

The first study of charm quark diffusion with respect to the jet axis in heavy ion collisions is presented. The measurement is performed using jets with pjet T > 60 GeV=c and D0 mesons with pD T > 4 GeV=c in lead-lead (Pb-Pb) and proton-proton (pp) collisions at a nucleon-nucleon center-of-mass energy of ffiffiffiffiffiffiffi sNN p ¼ 5.02 TeV, recorded by the CMS detector at the LHC. The radial distribution of D0 mesons with respect to the jet axis is sensitive to the production mechanisms of the meson, as well as to the energy loss and diffusion processes undergone by its parent parton inside the strongly interacting medium produced in Pb-Pb collisions. When compared to Monte Carlo event generators, the radial distribution in pp collisions is found to be well described by PYTHIA, while the slope of the distribution predicted by SHERPA is steeper than that of the data. In Pb-Pb collisions, compared to the pp results, the D0 meson distribution for 4 < pD T < 20 GeV=c hints at a larger distance on average with respect to the jet axis, reflecting a diffusion of charm quarks in the medium created in heavy ion collisions. At higher pD T , the Pb-Pb and pp radial distributions are found to be similar.

Item Type:	Article (Journal)
Additional Information:	7861/88924
Uncontrolled Keywords:	Charm Quark Diffusion inside Jets, Pb-Pb and pp Collisions, sNN p = 5.02 TeV
Subjects:	Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Department of Physics
Depositing User:	Dr Mohd Adli MD Ali
Date Deposited:	15 Mar 2021 17:04
Last Modified:	15 Mar 2021 17:04
URI:	http://irep.iium.edu.my/id/eprint/88924

Actions (login required)

View Item