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

Transverse momentum spectra of inclusive b jets in pPb collisions at $s_NN = $ 5.02 TeV
Transverse momentum spectra of inclusive b jets in pPb collisions at $s_NN = $ 5.02 TeV
We present a measurement of b jet transverse momentum (pT)(pT) spectra in proton-lead (pPb) collisions using a dataset corresponding to about 35 nb−135 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 View the MathML source1.22±0.15(stat+syst pPb)±0.27(syst pythia) averaged over all jets with pTpT between 55 and 400 GeV/c400 GeV/c and with |ηlab|<2|ηlab|<2. We also compare this result to predictions from models using perturbative calculations in quantum chromodynamics.
0370-2693
59
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

The CMS Collaboration (2016) Transverse momentum spectra of inclusive b jets in pPb collisions at $s_NN = $ 5.02 TeV. Physics Letters B, B754, 59. (doi:10.1016/j.physletb.2016.01.010). (In Press)

Record type: Article

Abstract

We present a measurement of b jet transverse momentum (pT)(pT) spectra in proton-lead (pPb) collisions using a dataset corresponding to about 35 nb−135 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 View the MathML source1.22±0.15(stat+syst pPb)±0.27(syst pythia) averaged over all jets with pTpT between 55 and 400 GeV/c400 GeV/c and with |ηlab|<2|ηlab|<2. We also compare this result to predictions from models using perturbative calculations in quantum chromodynamics.

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Accepted/In Press date: 12 January 2016
Organisations: Physics & Astronomy

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Local EPrints ID: 408258
URI: http://eprints.soton.ac.uk/id/eprint/408258
ISSN: 0370-2693
PURE UUID: 3efa033e-60bf-4052-b19d-5f1e852c27b2
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 18 May 2017 04:02
Last modified: 17 Dec 2019 01:44

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Contributors

Author: Vardan Khachatryan
Corporate Author: The CMS Collaboration

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