Measurements of the charm jet cross section and nuclear modification factor in pPb collisions at sNN=5.02 TeV
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 √sNN = 5.02 TeV, as well as results from charm quark jets in proton–proton (pp) collisions at √s =...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Elsevier BV
2017
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/63041/ http://irep.iium.edu.my/63041/ http://irep.iium.edu.my/63041/ http://irep.iium.edu.my/63041/1/63041_Measurements%20of%20the%20charm%20jet%20cross%20section_article.pdf http://irep.iium.edu.my/63041/2/63041_Measurements%20of%20the%20charm%20jet%20cross%20section_scopus.pdf |
| Summary: | 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 √sNN =
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 √sNN = 5.02 TeV of RpA =
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. |
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