The transverse momentum spectra of D0 mesons from b hadron decays are measured at midrapidity (|y|<1) in pp and Pb-Pb 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 Pb-Pb 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<5 GeV/c

Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., et al. (2019). Studies of Beauty Suppression via Nonprompt D0 Mesons in Pb-Pb Collisions at sqrt(sNN)=5.02  TeV. PHYSICAL REVIEW LETTERS, 123(2) [10.1103/PhysRevLett.123.022001].

Studies of Beauty Suppression via Nonprompt D0 Mesons in Pb-Pb Collisions at sqrt(sNN)=5.02  TeV

Benaglia, A.;Beschi, A.;Brianza, L.;Brivio, F.;Ciriolo, V.;Dinardo, M.  E.;Fiorendi, S.;Ghezzi, A.;Govoni, P.;Malberti, M.;Massironi, A.;Monti, F.;Moroni, L.;Paganoni, M.;Ragazzi, S.;Tabarelli de Fatis, T.;Zuolo, D.;Gerosa, R.;Lucchini, M.  T.;De Guio, F.;
2019

Abstract

The transverse momentum spectra of D0 mesons from b hadron decays are measured at midrapidity (|y|<1) in pp and Pb-Pb 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 Pb-Pb 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<5 GeV/c
Articolo in rivista - Articolo scientifico
Physics, LHC, CMS
English
2019
123
2
022001
none
Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., et al. (2019). Studies of Beauty Suppression via Nonprompt D0 Mesons in Pb-Pb Collisions at sqrt(sNN)=5.02  TeV. PHYSICAL REVIEW LETTERS, 123(2) [10.1103/PhysRevLett.123.022001].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/235848
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