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Title: Transverse momentum spectra of b jets in pPb collisions at √(s NN) = 5.02 TeV

Abstract

We present a measurement of b jet transverse momentum (p T) spectra in protonlead (pPb) collisions using a dataset corresponding to about 35 nb -1 collected with the CMS detector at the LHC. Jets from b quark fragmentation are found by exploiting the long lifetime of hadrons containing a b quark through tagging methods using distributions of the secondary vertex mass and displacement. Extracted cross sections for b jets are scaled by the effective number of nucleon-nucleon collisions and are compared to a reference obtained from PYTHIA simulations of pp collisions. Furthermore, the PYTHIA-based estimate of the nuclear modification factor is found to be 1.22±0.15 (stat+syst pPb)_0.27 (syst PYTHIA) averaged over all jets with p T between 55 and 400 GeV/c and with |η lab| < 2. We then compare this result to predictions from models using perturbative calculations in quantum chromodynamics.

Authors:
 [1]
  1. Yerevan Physics Inst. (YerPhI) (Armenia). et al.
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
CMS Collaboration
OSTI Identifier:
1234976
Alternate Identifier(s):
OSTI ID: 1226340
Report Number(s):
FERMILAB-PUB-15-473-CMS
Journal ID: ISSN 0370-2693; arXiv eprint number arXiv:1510.03373
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 754; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Khachatryan, Vardan. Transverse momentum spectra of b jets in pPb collisions at √(sNN) = 5.02 TeV. United States: N. p., 2016. Web. doi:10.1016/j.physletb.2016.01.010.
Khachatryan, Vardan. Transverse momentum spectra of b jets in pPb collisions at √(sNN) = 5.02 TeV. United States. doi:10.1016/j.physletb.2016.01.010.
Khachatryan, Vardan. Thu . "Transverse momentum spectra of b jets in pPb collisions at √(sNN) = 5.02 TeV". United States. doi:10.1016/j.physletb.2016.01.010.
@article{osti_1234976,
title = {Transverse momentum spectra of b jets in pPb collisions at √(sNN) = 5.02 TeV},
author = {Khachatryan, Vardan},
abstractNote = {We present a measurement of b jet transverse momentum (pT) spectra in protonlead (pPb) collisions using a dataset corresponding to about 35 nb-1 collected with the CMS detector at the LHC. Jets from b quark fragmentation are found by exploiting the long lifetime of hadrons containing a b quark through tagging methods using distributions of the secondary vertex mass and displacement. Extracted cross sections for b jets are scaled by the effective number of nucleon-nucleon collisions and are compared to a reference obtained from PYTHIA simulations of pp collisions. Furthermore, the PYTHIA-based estimate of the nuclear modification factor is found to be 1.22±0.15 (stat+syst pPb)_0.27 (syst PYTHIA) averaged over all jets with pT between 55 and 400 GeV/c and with |η lab| < 2. We then compare this result to predictions from models using perturbative calculations in quantum chromodynamics.},
doi = {10.1016/j.physletb.2016.01.010},
journal = {Physics Letters. Section B},
number = ,
volume = 754,
place = {United States},
year = {2016},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.physletb.2016.01.010

Citation Metrics:
Cited by: 11 works
Citation information provided by
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