Measurement of the B⁺ production cross section in pp collisions at √s=7 TeV

Abstract

Measurements of the total and differential cross sections dσ/dp_T^B and dσ/dy^B for B⁺ mesons produced in pp collisions at √s=7 TeV are presented. The data correspond to an integrated luminosity of 5.8pb^-1 collected by the CMS experiment operating at the LHC. The exclusive decay B⁺→J/ψK⁺, with J/ψ→µ⁺µ^-, is used to detect B⁺ mesons and to measure the production cross section as a function of p_T^B and y^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 µb, where the first uncertainty is statistical, the second is systematic, and the last is from the luminosity measurement.