Nuclear Modification Factor of D 0 Mesons in PbPb Collisions at √s[subscript NN] = 5.02 TeV
Name
1-s2.0-S0370269318304386-main.pdf
Size
1.61 MB
Format
Adobe PDF
Checksum (MD5)
c994d2f343aef7eb937d97441a73afd8
Author(s)
CMS Collaboration
Abercrombie, Daniel Robert
Allen, Brandon Leigh
Azzolini, Virginia
Barbieri, Richard Alexander
Baty, Austin Alan
Bi, Ran
Brandt, Stephanie Akemi
Busza, Wit
Cali, Ivan Amos
Date Issued
May 2018
Journal
Physics Letters B
Publisher
Elsevier BV
Citation
Sirunyan, A.M. et al. “Nuclear Modification Factor of D 0 Mesons in PbPb Collisions at √s[subscript NN] = 5.02 TeV.” Physics Letters B 782 (July 2018): 474–496 © 2018 The Author(s)
Version
Final published version
Abstract
The transverse momentum (pT) spectrum of prompt D0mesons and their antiparticles has been measured via the hadronic decay channels D⁰→K⁻π⁺ and D‾⁰→ K⁺π⁻ in pp and PbPb collisions at a centre-of-mass energy of 5.02 TeV per nucleon pair with the CMS detector at the LHC. The measurement is performed in the D⁰ meson pTrange of 2–100GeV/c and in the rapidity range of |y|<1. The pp (PbPb) dataset used for this analysis corresponds to an integrated luminosity of 27.4 pb⁻¹(530 μb⁻¹). The measured D⁰ meson pTspectrum in pp collisions is well described by perturbative QCD calculations. The nuclear modification factor, comparing D0meson yields in PbPb and pp collisions, was extracted for both minimum-bias and the 10% most central PbPb interactions. For central events, the D⁰ meson yield in the PbPb collisions is suppressed by a factor of 5–6 compared to the pp reference in the pTrange of 6–10GeV/c. For D0mesons in the high-pTrange of 60–100GeV/c, a significantly smaller suppression is observed. The results are also compared to theoretical calculations. Keywords: Physics; Suppression; Quark gluon plasma; Shadowing; D-meson; Open heavy-flavour
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution 4.0 International License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.physletb.2018.05.074
