Transverse momentum spectra of inclusive b jets in pPb collisions at √sNN=5.02 TeV

CMS Collaboration

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

We present a measurement of b jet transverse momentum (pT) spectra in proton-lead (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. 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 |ηlab|<2. We also compare this result to predictions from models using perturbative calculations in quantum chromodynamics.

Original languageEnglish
Pages (from-to)59-80
Number of pages22
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume754
DOIs
Publication statusPublished - 10 Mar 2016

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Keywords

  • b-tagging
  • CMS
  • Heavy ions
  • Physics

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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