Measurement of the radial profile of $D^{0}$ mesons in jets produced in pp and PbPb collisions at 5.02 TeV

CMS Physics Analysis Summaries
Report number	CMS-PAS-HIN-18-007
Title	Measurement of the radial profile of $D^{0}$ mesons in jets produced in pp and PbPb collisions at 5.02 TeV
Corporate author(s)	CMS Collaboration
Collaboration	CMS Collaboration
Subject category	Nuclear Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; CMS
Abstract	The first measurement of the radial distributions of $D^{0}$ mesons in jets in PbPb and pp collisions is presented. Data samples of PbPb and pp collisions at a nucleon-nucleon center-of-mass energy of $\sqrt{s_{NN}}=5.02$ $\mathrm{TeV}$, corresponding to integrated luminosities of 404 $\mu \rm b^{-1}$ and 27.4 $\rm p b^{-1}$, respectively, are recorded by the CMS detector at the LHC. The jets are reconstructed with an anti-$k_{T}$ algorithm with a distance parameter of $0.3$. The radial distribution of $D^{0}$ mesons with transverse momentum $p_{\mathrm{T}}>4 \,\mathrm{Ge\hspace{-.08em}V\hspace{-0.16em}/\hspace{-0.08em}}c$ are measured with respect to the jet axis. Modifications of $D^{0}$ radial distribution in PbPb collisions are presented by comparing PbPb spectra to the pp reference data, indicating a redistribution of the $D^{0}$ mesons close to the jet axis. This measurement provides new experimental constraints on the mechanisms of heavy-flavor production in proton-proton collisions as well as on the processes of parton energy loss and diffusion of heavy quarks inside the strongly interacting medium produced in heavy ion collisions.
Other source	Inspire
Related	superseded by: CERN-EP-2019-247
Email contact: [email protected] Fulltext in PDF Figure_001-b Figure_001-a Additional information for the analysis (restricted access)