Measurement of the B+ total cross section and B+ differential cross section d sigma/dp(T) in p(p)over-bar collisions at root s=1.8 TeV

We present measurements of the B+ mesontotal cross section and differential cross section dsigma/dp(T). The measurements use a 98+/-4 pb(-1) sample of p (p) over bar collisions at roots = 1.8 TeV collected by the CDF detector. Charged B mesoncandidates are reconstructed through the decay B+/- → J/psiK(+/-) with J/psi → mu(+)mu(-). The total cross section, measured in the central rapidity region \y\ lt 1.0 for p(T)(B) gt 6.0 GeV/c, is 3.6+/-0.6(stat + syst) mub. The measured differential cross section is substantially larger than typical QCD predictions calculated to next-to-leading order.