Measurements of the charm jet cross section and nuclear modification factor in pPb collisions at sNN=5.02 TeV
Yazarlar (1)
Doç. Dr. Mustafa Numan BAKIRCI Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Makale Türü Açık Erişim Özgün Makale (SCOPUS dergilerinde yayınlanan tam makale)
Dergi Adı Physics Letters Section B Nuclear Elementary Particle and High Energy Physics
Dergi ISSN 0370-2693 Wos Dergi Scopus Dergi
Makale Dili İngilizce Basım Tarihi 09-2017
Cilt / Sayı / Sayfa 772 / 1 / 306–329 DOI 10.1016/j.physletb.2017.06.053
Makale Linki https://www.sciencedirect.com/science/article/am/pii/S0370269317305294?via%3Dihub
UAK Araştırma Alanları
Fen Bilimleri ve Matematik
Özet
The CMS Collaboration presents the first measurement of the differential cross section of jets from charm quarks produced in proton–lead (pPb) collisions at a nucleon–nucleon center-of-mass energy of s NN= 5.02 TeV, as well as results from charm quark jets in proton–proton (pp) collisions at s= 2.76 and 5.02 TeV. By comparing the yields of the pPb and pp collision systems at the same energy, a nuclear modification factor for charm jets from 55 to 400 GeV/c in pPb collisions at s NN= 5.02 TeV of R p A= 0.92±0.07 (stat)±0.11 (syst) is obtained. This is consistent with an absence of final-state energy loss for charm quarks in pPb collisions. In addition, the fraction of jets coming from charm quarks is found to be consistent with that predicted by pythia 6 for pp collisions at s= 2.76 and 5.02 TeV, and is independent of the jet transverse momentum from 55 to 400 GeV/c.
Anahtar Kelimeler
Charm-tagging | CMS | Heavy ions | Heavy-flavor