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
Abstrakt
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.