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Title: Studies of beauty suppression via nonprompt D$^0$ mesons in PbPb collisions at $$\sqrt{s_\mathrm{NN}}=$$ 5.02 TeV

Abstract

The transverse momentum spectra of D$^0$ mesons from b hadron decays are measured at midrapidity ($|y|<1$) in pp and PbPb 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 PbPb collisions, the B$$\to$$D$^0$ yield is found to be suppressed in the measured $$p_\mathrm{T}$$ 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 $$p_\mathrm{T}$$ around 10 GeV$/c$. While theoretical calculations incorporating partonic energy loss in the quark-gluon plasma can successfully describe the measured B$$\to$$D$^0$ suppression at higher $$p_\mathrm{T}$$, the data show an indication of larger suppression than the model predictions in the range of 2$$\lt p_\mathrm{T}\lt$$5 GeV$/c$.

Authors:
;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
CMS
OSTI Identifier:
1484193
Report Number(s):
FERMILAB-PUB-18-646-CMS; arXiv:1810.11102; CMS-HIN-16-016; CERN-EP-2018-264
1700575
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
Phys.Rev.Lett.
Additional Journal Information:
Journal Name: Phys.Rev.Lett.
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Sirunyan, Albert M, and et al. Studies of beauty suppression via nonprompt D$^0$ mesons in PbPb collisions at $\sqrt{s_\mathrm{NN}}=$ 5.02 TeV. United States: N. p., 2018. Web.
Sirunyan, Albert M, & et al. Studies of beauty suppression via nonprompt D$^0$ mesons in PbPb collisions at $\sqrt{s_\mathrm{NN}}=$ 5.02 TeV. United States.
Sirunyan, Albert M, and et al. Thu . "Studies of beauty suppression via nonprompt D$^0$ mesons in PbPb collisions at $\sqrt{s_\mathrm{NN}}=$ 5.02 TeV". United States. https://www.osti.gov/servlets/purl/1484193.
@article{osti_1484193,
title = {Studies of beauty suppression via nonprompt D$^0$ mesons in PbPb collisions at $\sqrt{s_\mathrm{NN}}=$ 5.02 TeV},
author = {Sirunyan, Albert M and et al.},
abstractNote = {The transverse momentum spectra of D$^0$ mesons from b hadron decays are measured at midrapidity ($|y|<1$) in pp and PbPb 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 PbPb collisions, the B$\to$D$^0$ yield is found to be suppressed in the measured $p_\mathrm{T}$ 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 $p_\mathrm{T}$ around 10 GeV$/c$. While theoretical calculations incorporating partonic energy loss in the quark-gluon plasma can successfully describe the measured B$\to$D$^0$ suppression at higher $p_\mathrm{T}$, the data show an indication of larger suppression than the model predictions in the range of 2$\lt p_\mathrm{T}\lt$5 GeV$/c$.},
doi = {},
journal = {Phys.Rev.Lett.},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {10}
}