Measurement of the Cross Section for Open-Beauty Production in Photon-Photon Collisions at LEP

Details Measurement of the Cross Section for Open-Beauty Production in Photon-Photon Collisions at LEP Measurement of the Cross Section for Open-Beauty Production in Photon-Photon Collisions at LEP

2005-07-09

arxiv.org/abs/hep-ex/0507041v1

Phys.Lett.B619:71-81,2005

Physics

High Energy Physics

High Energy Physics - Experiment

Scientific paper

10.1016/j.physletb.2005.05.072

The cross section for open-beauty production in photon-photon collisions is measured using the whole high-energy and high-luminosity data sample collected by the L3 detector at LEP. This corresponds to 627/pb of integrated luminosity for electron-positron centre-of-mass energies from 189GeV to 209GeV. Events containing b quarks are identified through their semi-leptonic decay into electrons or muons. The e+e- -> e+e-b b~X cross section is measured within our fiducial volume and then extrapolated to the full phase space. These results are found to be in significant excess with respect to Monte Carlo predictions and next-to-leading order QCD calculations.

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