Artigo
Measurement of the B-s(0) Production Cross Section with B-s(0) -> J/psi phi Decays in pp Collisions at root s=7 TeV
Fecha
2011-09-20Registro en:
Physical Review D. College Pk: Amer Physical Soc, v. 84, n. 5, p. 16, 2011.
1550-7998
10.1103/PhysRevD.84.052008
WOS:000295046500001
WOS000295046500001.pdf
Autor
Yerevan Phys Inst
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)
Univ Estado Rio de Janeiro
ETH
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Natl Cent Univ
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Cukurova Univ
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Kharkov Phys & Technol Inst
Univ Bristol
Rutherford Appleton Lab
Universidade Estadual Paulista (Unesp)
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CIEMAT
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Paul Scherrer Inst
Resumen
The B-s(0) differential production cross section is measured as functions of the transverse momentum and rapidity in pp collisions at root s = 7 TeV, using the B-s(0) -> J/psi phi decay, and compared with predictions based on perturbative QCD calculations at next-to-leading order. The data sample, collected by the CMS experiment at the LHC, corresponds to an integrated luminosity of 40 pb(-1). The B-s(0) is reconstructed from the decays J/psi -> mu+mu- and phi -> K+K-. The integrated B-s(0) cross section times B-s(0) -> J/psi phi branching fraction in the range 8 < p(T)(B) < 50 GeV/c and vertical bar y(B)vertical bar < 2.4 is measured to be 6.9 +/- 0.6 +/- 0.6 nb, where the first uncertainty is statistical and the second is systematic.