Measurement of electrons from beauty hadron decays in pp collisions at √s = 7 TeV

Submission Date: 
29/10/2012
Article Information
Submission Form
System: 
p-p
Energy: 
7 TeV
Abstract Plain Text: 

The production cross section of electrons from semileptonic decays of beauty hadrons was measured at mid-rapidity (|y| < 0.8) in the transverse momentum range 1 < pt < 8 GeV/c with the ALICE experiment at the CERN LHC in pp collisions at a center of mass energy \sqrt{s} = 7 TeV using an integrated luminosity of 2.2 nb^{-1}. Electrons from beauty hadron decays were selected based on the displacement of the decay vertex from the collision vertex. A perturbative QCD calculation agrees with the measurement within uncertainties. The data were extrapolated to the full phase space to determine the total cross section for the production of beauty quark-antiquark pairs.