Measurement of J/psi and psi(2S) Prompt Double-Differential Cross Sections in pp Collisions at root s=7 TeVopen access
- Authors
- Khachatryan, V; Sirunyan, AM; Tumasyan, A; Adam, W; Bergauer, T; Dragicevic, M; Eroe, J; Friedl, M; Fruhwirth, R; Kim, Tae Jeong
- Issue Date
- May-2015
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW LETTERS, v.114, no.19, pp.25 - 51
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW LETTERS
- Volume
- 114
- Number
- 19
- Start Page
- 25
- End Page
- 51
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/142984
- DOI
- 10.1103/PhysRevLett.114.191802
- ISSN
- 0031-9007
- Abstract
- The double-differential cross sections of promptly produced J/psi and psi(2S) mesons are measured in pp collisions at root s = 7 TeV, as a function of transverse momentum p(T) and absolute rapidity \y\. The analysis uses J/psi and psi(2S) dimuon samples collected by the CMS experiment, corresponding to integrated luminosities of 4.55 and 4.90 fb(-1), respectively. The results are based on a two-dimensional analysis of the dimuon invariant mass and decay length, and extend to p(T) = 120 and 100 GeV for the J/psi and psi(2S), respectively, when integrated over the interval \y\ ˂ 1.2. The ratio of the psi(2S) to J/psi cross sections is also reported for \y\ ˂ 1.2, over the range 10 ˂ p(T) ˂ 100 GeV. These are the highest p(T) values for which the cross sections and ratio have been measured.
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