# Transverse momentum spectra of b jets in pPb collisions at sqrt(s[NN]) = 5.02 TeV

Abstract : We present a measurement of b jet transverse momentum (pt) spectra in proton-lead (pPb) collisions using a dataset corresponding to about 35 inverse nanobarns 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 abs(eta[lab])<2. We also compare this result to predictions from models using perturbative calculations in quantum chromodynamics.
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Journal articles
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http://hal.in2p3.fr/in2p3-01214882
Contributor : Dominique Girod Connect in order to contact the contributor
Submitted on : Tuesday, October 13, 2015 - 11:34:59 AM
Last modification on : Monday, December 13, 2021 - 9:15:26 AM

### Citation

V. Khachatryan, M. Besancon, F. Couderc, M. Dejardin, D. Denegri, et al.. Transverse momentum spectra of b jets in pPb collisions at sqrt(s[NN]) = 5.02 TeV. Physics Letters B, Elsevier, 2016, 754, pp.59-80. ⟨10.1016/j.physletb.2016.01.010⟩. ⟨in2p3-01214882⟩

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