ملخص
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.
اللغة الأصلية | English |
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الصفحات (من إلى) | 59-80 |
عدد الصفحات | 22 |
دورية | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
مستوى الصوت | 754 |
المعرِّفات الرقمية للأشياء | |
حالة النشر | Published - مارس 10 2016 |
منشور خارجيًا | نعم |
ASJC Scopus subject areas
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