Artículos de revistas
Measurement of the relative prompt production rate of chi(c2) and chi(c1) in pp collisions at root s=7 TeV
Fecha
2012-12-01Registro en:
European Physical Journal C. New York: Springer, v. 72, n. 12, p. 22, 2012.
1434-6044
10.1140/epjc/s10052-012-2251-3
WOS:000314407400009
WOS000314407400009.pdf
0974011233679396
Autor
CERN
Yerevan Phys Inst
Inst Hochenergiephys OeAW
Natl Ctr Particle & High Energy Phys
Univ Antwerp
Vrije Univ Brussel
Univ Libre Brussels
Univ Ghent
Catholic Univ Louvain
Univ Mons
Centro Brasileiro de Pesquisas Físicas (CBPF)
Universidade do Estado do Rio de Janeiro (UERJ)
Universidade Estadual Paulista (Unesp)
Vienna Univ Technol
NICPB
Universidade Federal do ABC (UFABC)
CALTECH
Bulgarian Acad Sci
Univ Sofia
Inst High Energy Phys
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Tech Univ Split
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Institución
Resumen
Ameasurement is presented of the relative prompt production rate of chi(c2) and chi(c1) with 4.6 fb(-1) of data collected by the CMS experiment at the LHC in pp collisions at root s = 7 TeV. The two states are measured via their radiative decays chi(c) -> J/psi + gamma, with the photon converting into an e(+)e(-) pair for J/psi rapidity \y(J/psi)\ < 1.0 and photon transverse momentum p(T)(gamma) > 0.5 GeV/c. The measurement is given for six intervals of p(T)(J/psi) between 7 and 25 GeV/c. The results are compared to theoretical predictions.