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

Authors

A. M. Sirunyan et al. (CMS Collaboration) Year 2019

Pubblication type

Paper International Journal with referee

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

Reference

Phys. Rev. Lett. 123 (2019) 022001

WEB Reference

http://inspirehep.net/record/1700575?ln=it

Research unit

RADEC

LastUpdate

05/01/2022