The formation in two-photon collisions at LEP energies
production in interactions has been detected via its decays into ,K + K - K + K - and in the data taken with the DELPHI detector at LEP1 and LEP2 energies. The two-photon radiative width averaged over all observed decay channels is = 13.9 2.0 (stat.) 1.4(syst.) 2.7 (BR) keV. No direct decay channel has been observed. An upper limit < 5.5 keV at 95% confidence level has been evaluated for this decay mode.
© Springer-Verlag, 2003