From the analysis of the reactions e+e- --> l+l- (ngamma) (l = e,mu, tau) we observe four events, one e+e-gammagamma and three mu +mu - gammagamma, with the invariant mass of the photon pairs close to 60 GeV. These events were selected from a data sample collected in the L3 detector corresponding to 950000 produced Z0's. More data are necessary to ascertain the origin of these events.
High Mass Photon Pairs In L+l-gamma-gamma Events At Lep
SANTOCCHIA, Attilio;FIANDRINI, Emanuele;BERTUCCI, Bruna;PAULUZZI, Michele
1992
Abstract
From the analysis of the reactions e+e- --> l+l- (ngamma) (l = e,mu, tau) we observe four events, one e+e-gammagamma and three mu +mu - gammagamma, with the invariant mass of the photon pairs close to 60 GeV. These events were selected from a data sample collected in the L3 detector corresponding to 950000 produced Z0's. More data are necessary to ascertain the origin of these events.File in questo prodotto:
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