Measurement of exclusive Upsilon photoproduction from protons in pPb collisions at root sNN=5.02 Tev
The exclusive photoproduction of ϒ(nS) meson states from protons, γ p → ϒ(nS) p (with n = 1, 2, 3), is studied in ultraperipheral pPb collisions at a centre-of-mass energy per nucleon pair of √sNN = 5.02 TeV. The measurement is performed using the ϒ(nS) → μ+μ− decay mode, with data collected by...
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| 主要な著者: | , , , , , |
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| フォーマット: | 論文 |
| 言語: | English English English |
| 出版事項: |
Springer New York LLC
2019
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| 主題: | |
| オンライン･アクセス: | http://irep.iium.edu.my/79910/1/79910_Measurement%20of%20exclusive%20%CF%92%20photoproduction_article.pdf http://irep.iium.edu.my/79910/2/79910_Measurement%20of%20exclusive%20%CF%92%20photoproduction_scopus.pdf http://irep.iium.edu.my/79910/3/79910_Measurement%20of%20exclusive%20%CF%92%20photoproduction_wos.pdf http://irep.iium.edu.my/79910/ https://link.springer.com/content/pdf/10.1140/epjc/s10052-019-6774-8.pdf |
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| 要約: | The exclusive photoproduction of ϒ(nS) meson
states from protons, γ p → ϒ(nS) p (with n = 1, 2, 3), is
studied in ultraperipheral pPb collisions at a centre-of-mass
energy per nucleon pair of √sNN = 5.02 TeV. The measurement is performed using the ϒ(nS) → μ+μ− decay mode,
with data collected by the CMS experiment corresponding
to an integrated luminosity of 32.6 nb−1. Differential cross
sections as functions of the ϒ(nS) transverse momentum
squared p2
T, and rapidity y, are presented. The ϒ(1S) photoproduction cross section is extracted in the rapidity range
|y| < 2.2, which corresponds to photon–proton centre-ofmass energies in the range 91 < Wγ p < 826 GeV. The data
are compared to theoretical predictions based on perturbative
quantum chromodynamics and to previous measurements. |
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