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Adam, W.

Publications and source records attributed to Adam, W..

442 records · Page 25
All sourcesNASA NTRSDOE OSTI
DOE OSTI2016

Transverse momentum spectra of inclusive b jets in pPb collisions at $\sqrt{s_{NN}} =$ 5.02 TeV

We present a measurement of b jet transverse momentum ($p$ T ) 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 $p$ T between 55 and 400GeV/c and with |$η$ lab | < 2. We also compare this result to predictions from models using perturbative calculations in quantum chromodynamics.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗