Studies of beauty suppression via nonprompt D0 mesons in Pb-Pb collisions at sqrt(s[NN]) = 5.02 TeVстатья
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Дата последнего поиска статьи во внешних источниках: 27 сентября 2019 г.
Аннотация:The transverse momentum spectra of D0 mesons from b hadron decays are measured at midrapidity (|y| < 1) in pp and PbPb collisions at a nucleon-nucleon center of mass energy of 5.02 TeV with the CMS detector at the LHC. The D0 mesons from b hadron decays are distinguished from prompt D0 mesons by their decay topologies. In PbPb collisions, the B → D0 yield is found to be suppressed in the measured pT range from 2 to 100 GeV/c as compared to pp collisions. The suppression is weaker than that of prompt D0 mesons and charged hadrons for pT around 10 GeV/c. While theoretical calculations incorporating partonic energy loss in the quark-gluon plasma can successfully describe the measured B → D0 suppression at higher pT, the data show an indication of larger suppression than the model predictions in the range of 2 < pT < 5 GeV/c.