ICPAQGP, Goa, December 2010 Estimation of b-quark production cross- section in semileptonic decays Trigger eff= 82% reconstruction=97% -jet association=77% Visible rate Models for fake muon + underlying effect dominate experimental uncertainty ~ 15-20% Larger discrepancy with theory at low p T and central region Uncertainty in luminosity ~ 11% 12
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