Search for $\eta_b$ in Two-Photon Events

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A search for the pseudoscalar meson eta_b was performed at LEP~II energies with an integrated luminosity of 700pb^-1. The search, done for the decay modes into 4 and 6 charged particles yielded 0 and 1 candidates, respectively. Upper limits on Gamma_gammagamma(eta_b)*BR for both modes of 57eV and 12...

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Detalles Bibliográficos
Autor principal: Böhrer, A
Lenguaje:eng
Publicado: 2001
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1142/9789812777157_0058
http://cds.cern.ch/record/523166
Descripción
Sumario:A search for the pseudoscalar meson eta_b was performed at LEP~II energies with an integrated luminosity of 700pb^-1. The search, done for the decay modes into 4 and 6 charged particles yielded 0 and 1 candidates, respectively. Upper limits on Gamma_gammagamma(eta_b)*BR for both modes of 57eV and 128eV were obtained with corresponding limits of 17% and 38% on branching ratios BR(eta_b) -> 4 charged particles and BR(eta_b) -> 6 charged particles at a confidence level of 95%. The candidate has a mass of 9.30 +- 0.04GeV.

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