| Title: | SEARCH FOR ηb IN TWO-PHOTON EVENTS |
| DOI No: | 10.1142/9789812777157_0058 |
| Source: | PHOTON 2001 (pp 289-292)
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| Author(s): | ARMIN BÖHRER
Fachbereich Physik, Universität Siegen, 57068 Siegen, Germany
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| Abstract: | A search for the pseudoscalar meson ηb was performed at LEP II energies with an integrated luminosity of 700 pb-1. The search, done for the decay modes into 4 and 6 charged particles yielded 0 and 1 candidates, respectively. Upper limits on Γγγ(η)×BR for both modes of 57 eV and 128 eV were obtained with corresponding limits of 17% and 38% on branching ratios BR(ηb → 4 charged particles) and BR(ηb → 6 charged particles) at a confidence level of 95%. The candidate has a mass of 9.30 ± 0.04 GeV. |
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