The transverse momentum spectra of D^0 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 D^0 mesons from b hadron decays are distinguished from prompt D^0 mesons by their decay topologies. In Pb-Pb collisions, the B→D^0 yield is found to be suppressed in the measured p_T range from 2 to 100  GeV/c as compared to pp collisions. The suppression is weaker than that of prompt D^0 mesons and charged hadrons for p_T around 10  GeV/c. While theoretical calculations incorporating partonic energy loss in the quark-gluon plasma can successfully describe the measured B→D^0 suppression at higher p_T, the data show an indication of larger suppression than the model predictions in the range of 2<5  GeV/c.

(2019). Studies of Beauty Suppression via Nonprompt D0 Mesons in Pb-Pb Collisions at √sNN=5.02  TeV [journal article - articolo]. In PHYSICAL REVIEW LETTERS. Retrieved from http://hdl.handle.net/10446/144728

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

Re V.;Vai I.;
2019-01-01

Abstract

The transverse momentum spectra of D^0 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 D^0 mesons from b hadron decays are distinguished from prompt D^0 mesons by their decay topologies. In Pb-Pb collisions, the B→D^0 yield is found to be suppressed in the measured p_T range from 2 to 100  GeV/c as compared to pp collisions. The suppression is weaker than that of prompt D^0 mesons and charged hadrons for p_T around 10  GeV/c. While theoretical calculations incorporating partonic energy loss in the quark-gluon plasma can successfully describe the measured B→D^0 suppression at higher p_T, the data show an indication of larger suppression than the model predictions in the range of 2<5  GeV/c.
articolo
2019
Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Dragicevic, M.; Ero, J.; Escalante Del Valle, A.; Fl...espandi
(2019). Studies of Beauty Suppression via Nonprompt D0 Mesons in Pb-Pb Collisions at √sNN=5.02  TeV [journal article - articolo]. In PHYSICAL REVIEW LETTERS. Retrieved from http://hdl.handle.net/10446/144728
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10446/144728
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