A study of twelve distinct decay channels of the eta(c) has been performed with the L3 detector at LEP, for an integrated luminosity of 30 pb-1. Summing all channels, 28 candidate events have been identified, with an estimated background of 11 events. The two-photon radiative width is evaluated to be GAMMA(gammagamma) (eta(c)) = 8.0 +/- 2.3 +/- 2.4 keV.
Measurement of Eta(c) Production In Untagged 2-photon Collisions At Lep
SANTOCCHIA, Attilio;FIANDRINI, Emanuele;PAULUZZI, Michele
1993
Abstract
A study of twelve distinct decay channels of the eta(c) has been performed with the L3 detector at LEP, for an integrated luminosity of 30 pb-1. Summing all channels, 28 candidate events have been identified, with an estimated background of 11 events. The two-photon radiative width is evaluated to be GAMMA(gammagamma) (eta(c)) = 8.0 +/- 2.3 +/- 2.4 keV.File in questo prodotto:
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