Measurement of the B+ Production Cross Section in pp Collisions at sqrt(s) = 7 TeV

TL;DR

This paper reports the measurement of B+ meson production cross sections in proton-proton collisions at 7 TeV using CMS data, providing detailed differential and total cross section values.

Contribution

It presents the first measurement of B+ production cross sections at 7 TeV with detailed differential analysis using the CMS detector.

Findings

Total cross section for B+ with p_t > 5 GeV and |y| < 2.4 is 28.1 microbarns.

Differential cross sections as functions of transverse momentum and rapidity are provided.

Results agree with theoretical predictions within uncertainties.

Abstract

Measurements of the total and differential cross sections with respect to transverse momentum and rapidity for B+ mesons produced in pp collisions at sqrt(s) = 7 TeV are presented. The data correspond to an integrated luminosity of 5.8 inverse picobarns collected by the CMS experiment operating at the LHC. The exclusive decay B+ to J/psi K+, with the J/psi decaying to an oppositely charged muon pair, is used to detect B+ mesons and to measure the production cross section as a function of the transverse momentum and rapidity of the B. The total cross section for p_t(B) > 5 GeV and |y(B)| < 2.4 is measured to be 28.1 +/- 2.4 +/- 2.0 +/- 3.1 microbarns, where the first uncertainty is statistical, the second is systematic, and the last is from the luminosity measurement.