Measurement of Beauty Photoproduction near Threshold using Di-electron Events with the H1 Detector at HERA
Abstract
The cross section for ep -> e bb X in photoproduction is measured with the H1 detector at the ep-collider HERA. The decay channel bb -> ee X' is selected by identifying the semi-electronic decays of the b-quarks. The total production cross section is measured in the kinematic range given by the photon virtuality Q2 <= 1 GeV2, the inelasticity 0.05 <= y <= 0.65 and the pseudorapidity of the b-quarks |eta(b)|,|eta(b)| <= 2. The differential production cross section is measured as a function of the average transverse momentum of the beauty quarks <PT(b)> down to the threshold. The results are compared to next-to-leading-order QCD predictions.
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