Nuclear modification factor of D0 mesons in PbPb collisions at 𝑠NN‾‾‾‾√=5.02 TeV
Abstract
The transverse momentum (pT) spectrum of prompt D0 mesons and their antiparticles has been measured via the hadronic decay channels D0 -> K-π+ and D0 -> 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 range of 2–100 GeV/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 pT spectrum in pp collisions is well described by perturbative QCD calculations. The nuclear modification factor, comparing D0 meson yields in PbPb and pp collisions, was extracted for both minimum-bias and the 10% most central PbPb interactions. For central events, the meson yield in the PbPb collisions is suppressed by a factor of 5–6 compared to the reference in the pT range of 6–10 GeV/c. For D0 mesons in the high-pT range of 60–100 GeV/c, a significantly smaller suppression is observed. The results are also compared to theoretical calculations. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000269944Publication status
publishedExternal links
Journal / series
Physics Letters BVolume
Pages / Article No.
Publisher
ElsevierSubject
Physics; Suppression; Quark gluon plasma; Shadowing; D-meson; Open heavy-flavourOrganisational unit
03593 - Dissertori, Günther / Dissertori, Günther
03904 - Wallny, Rainer / Wallny, Rainer
08803 - Grab, Christoph (Tit.Prof.)
09631 - Shchutska, Lesya (ehemalig) / Shchutska, Lesya (former)
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