Inhaltszusammenfassung

The production of non-prompt D0 mesons from beauty-hadron decays was measured at midrapidity (∣∣y∣∣<0.5) in Pb-Pb collisions at a nucleon-nucleon center-of-mass energy of sNN‾‾√=5.02 TeV with the ALICE experiment at the LHC. Their nuclear modification factor (RAA), measured for the first time down to pT=1 GeV/c in the 0−10% and 30−50% centrality classes, indicates a significant suppression, up to a factor of about three, for pT>5 GeV/c in the 0−10% central Pb-Pb collisions. The data are descr...The production of non-prompt D0 mesons from beauty-hadron decays was measured at midrapidity (∣∣y∣∣<0.5) in Pb-Pb collisions at a nucleon-nucleon center-of-mass energy of sNN‾‾√=5.02 TeV with the ALICE experiment at the LHC. Their nuclear modification factor (RAA), measured for the first time down to pT=1 GeV/c in the 0−10% and 30−50% centrality classes, indicates a significant suppression, up to a factor of about three, for pT>5 GeV/c in the 0−10% central Pb-Pb collisions. The data are described by models that include both collisional and radiative processes in the calculation of beauty-quark energy loss in the quark-gluon plasma, and quark recombination in addition to fragmentation as a hadronization mechanism. The ratio of the non-prompt to prompt D0 meson RAA is larger than unity for pT>4 GeV/c in the 0−10% central Pb-Pb collisions, as predicted by models in which beauty quarks lose less energy than charm quarks in the quark-gluon plasma because of their larger mass. » weiterlesen» einklappen

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DDC Sachgruppe:
Physik