Studies of beauty suppression via nonprompt D-0 mesons in Pb-Pb collisions at root s(NN)=5.02 TeV

• Main Authors: Sirunyan, A. M., Tumasyan, A. R., Adam, Wolfgang, Ambrogi, Federico, Asilar, Ece, Md. Ali, Mohd. Adli
• Format: Article
• Language: English; English; English
• Published: American Physical Society 2019
• Subjects: Q Science (General); QC Physics
• Online Access: http://irep.iium.edu.my/79625/1/79625_Studies%20of%20Beauty%20Suppression%20via%20Nonprompt_article.pdf; http://irep.iium.edu.my/79625/2/79625_Studies%20of%20Beauty%20Suppression%20via%20Nonprompt_scopus.pdf; http://irep.iium.edu.my/79625/3/79625_Studies%20of%20Beauty%20Suppression%20via%20Nonprompt_wos.pdf; http://irep.iium.edu.my/79625/; https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.123.022001

The transverse momentum spectra of D0 mesons from b hadron decays are measured at midrapidity (jyj < 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 < pT < 5 GeV=c.