Measurement of Bottom Versus Charm as a Function of Transverse Momentum with Electron-Hadron Correlations inp+pCollisions ats=200 GeV

The momentum distribution of electrons from semileptonic decays of charm and bottom quarks for midrapidity |y| e(+/-)K(-/+)X (K unidentified) reconstruction. It is found that the yield of electrons from bottom becomes significant above 4 GeV/c in p(T). A fixed-order-plus-next-to-leading-log perturbative quantum chromodynamics calculation agrees with the data within the theoretical and experimental uncertainties. The extracted total bottom production cross section at this energy is sigma(bb)=3.2(-1.1)(+1.2)(stat)(-1.3)(+1.4)(syst)mu b.