Elsevier

Physics Letters B

Volume 754, 10 March 2016, Pages 59-80
Physics Letters B

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

https://doi.org/10.1016/j.physletb.2016.01.010Get rights and content
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Abstract

We present a measurement of b jet transverse momentum (pT) spectra in proton-lead (pPb) collisions using a dataset corresponding to about 35nb1 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 400GeV/c and with |ηlab|<2. We also compare this result to predictions from models using perturbative calculations in quantum chromodynamics.

Keywords

CMS
Physics
Heavy ions
b-tagging

Cited by (0)

1

Also at Vienna University of Technology, Vienna, Austria.

2

Also at CERN, European Organization for Nuclear Research, Geneva, Switzerland.

E-mail address: [email protected].