Measurement of the Strange B Meson Production Cross Section with J/Psi phi Decays in pp Collisions at sqrt(s) = 7 TeV

TL;DR

This paper measures the production cross section of B_s mesons in proton-proton collisions at 7 TeV using J/Psi phi decays, providing data to compare with QCD predictions and improve understanding of heavy flavor production.

Contribution

It presents the first measurement of B_s meson production cross section at 7 TeV using the CMS detector, with detailed analysis of decay channels and comparison to theoretical models.

Findings

Measured B_s cross section as 6.9 +/- 0.6 +/- 0.6 nb.

Provided differential cross sections as functions of transverse momentum and rapidity.

Compared experimental results with next-to-leading order perturbative QCD predictions.

Abstract

The B^0_s differential production cross section is measured as functions of the transverse momentum and rapidity in pp collisions at sqrt(s) = 7 TeV, using the 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 inverse picobarns. The B^0_s is reconstructed from the decays J/Psi to an oppositely charged muon pair and phi to K+ K-. The integrated B^0_s cross section times B^0_s to J/Psi phi branching fraction in the range 8 < pt(B) < 50 GeV/c and |y(b)| < 2.4 is measured to be 6.9 +/- 0.6 +/- 0.6 nb, where the first uncertainty is statistical and the second is systematic.