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 / O. ADRIANI, M. AGUILARBENITEZ, S. AHLEN, J. ALCARAZ, A. ALOISIO, G. ALVERSON, M. G. ALVIGGI, G. AMBROSI, Q. AN, H. ANDERHUB, A. L. ANDERSON, V. P. ANDREEV, L. ANTONOV, D. ANTREASYAN, P. ARCE, A. AREFIEV, A. ATAMANCHUK, T. AZEMOON, T. AZIZ, P. V. K., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 295:(1992), pp. 337-346. [10.1016/0370-2693(92)91576-U]

High Mass Photon Pairs In L+l-gamma-gamma Events At Lep

ADRIANI, OSCAR;D'ALESSANDRO, RAFFAELLO;M. LENTI;
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.
1992
295
337
346
O. ADRIANI;M. AGUILARBENITEZ;S. AHLEN;J. ALCARAZ;A. ALOISIO;G. ALVERSON;M. G. ALVIGGI;G. AMBROSI;Q. AN;H. ANDERHUB;A. L. ANDERSON;V. P. AN...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/772744
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