Search for etab in two-photon collisions at LEP II with the DELPHI detector
Abstract
The pseudoscalar meson etab has been searched for in two-photon interactions at LEP II. The data sample corresponds to a total integrated luminosity of 617 pb-1 at centre-of-mass energies ranging from 161 to 209 GeV. Upper limits at a confidence level of 95% on the product Gammaγγ(etab) x BR(etab) are 190, 470 and 660 eV/c2 for the etab decaying into 4, 6 and 8 charged particles, respectively.
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