Sirunyan, AM (2017) Measurement of prompt and nonprompt J/ψ production in pp and pPb collisions at √sNN = 5.02 TeV. In: European Physics Journal .
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Abstract
This paper reports the measurement of J/ψ meson production in proton–proton (pp) and proton–lead(pPb) collisions at a center-of-mass energy per nucleon pair of 5.02 TeV by the CMS experiment at the LHC. The data samples used in the analysis correspond to integrated luminosities of 28 pb−1 and 35 nb−1 for pp and pPb collisions, respectively. Prompt and nonprompt J/ψ mesons, the latter produced in the decay of B hadrons, are measured in their dimuon decay channels. Differential cross sections are measured in the transverse momentum range of 2 < pT < 30 GeV/c, and center-of-mass rapidity ranges of |yCM| < 2.4 (pp) and −2.87 < yCM < 1.93 (pPb). The nuclear modification factor, RpPb, is measured as a function of both pT and yCM. Small modifications to the J/ψ cross sections are observed in pPb relative to pp collisions. The ratio of J/ψ production cross sections in p-going and Pb-going directions, RFB, studied as functions of pT and yCM, shows a significant decrease for increasing transverse energy deposited at large pseudorapidities. These results, which cover a wide kinematic range, provide new insight on the role of cold nuclear matter effects on prompt and nonprompt J/ψ production.
| Item Type: | Journal Article |
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| Publication: | European Physics Journal |
| Additional Information: | Copyright in this article belongs to the authors. |
| Department/Centre: | Division of Physical & Mathematical Sciences > Centre for High Energy Physics |
| Date Deposited: | 07 Jun 2022 12:33 |
| Last Modified: | 08 Jun 2022 11:26 |
| URI: | https://eprints.iisc.ac.in/id/eprint/73396 |
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