Bottom Production in Two-Photon Collisions at LEP

Details Bottom Production in Two-Photon Collisions at LEP Bottom Production in Two-Photon Collisions at LEP

2001-06-05

arxiv.org/abs/hep-ex/0106020v1

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, Submitted to proceedings of the Conference: DIS01, Bologna

Scientific paper

Results on inclusive and exclusive bottom production in gammagamma collisions are presented. The total cross section of inclusive bottom production is investigated through its leptonic decays at LEP II energies by the experiments L3 and OPAL. The average cross section, after correction for acceptances and efficiencies, is sigma_tot = 13.3 +- 1.5 +- 2.3 pb. The next-to-leading order calculations are lower than the data by a factor three, which corresponds to a difference of more than three standard deviations. ALEPH studied the exclusive bottom production. Searching for the eta_b one candidate is found. Limits on Gamma_gammagamma(eta_b)*BR for 4 and 6 charged particles are extracted. The candidate has a mass of 9.30 +- 0.04 GeV.

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