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Studies of Beauty Suppression via Nonprompt  D 0  Mesons in Pb-Pb Collisions at  √ s NN = 5.02  TeV
Journal article   Open access   Peer reviewed

Studies of Beauty Suppression via Nonprompt D 0 Mesons in Pb-Pb Collisions at √ s NN = 5.02  TeV

A. M. Sirunyan, A. Tumasyan, W. Adam, Francisco Javier Cuevas Maestro, Carlos Francisco Erice Cid, Javier Fernández Menéndez, Santiago Folgueras Gómez, Isidro González Caballero, Juan Rodrigo González Fernández, José Enrique Palencia Cortezón, …
Physical review letters, Vol.123(2), 022001
07/09/2019
DOI: 10.1103/PhysRevLett.123.022001
PMID: 31386524
url
https://doi.org/10.1103/PhysRevLett.123.022001View
Published (Version of record) Open Access

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<pT<5  GeV/c.

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