We have looked for evidence of excited lepton production in Z0 decay observed in the ALEPH detector at LEP. We find no ll gamma gamma events and set new limits at 95% CL on L* masses at 44.6, 44.6 and 41.2 GeV/c2 for e* mu* e tau* respectively. Observed events in the ll gamma channels are consistent with radiative effects and we set limits for the first time on the l*l Z coupling for l* masses in the range up to 86 GeV/c2.
Search For Excited Leptons In Z0 Decay
CIOCCI, MARIA AGNESE;BATIGNANI, GIOVANNI;FERRANTE, ISIDORO;FIDECARO, FRANCESCO;FORTI, FRANCESCO;GIORGI, MARCELLO;MESSINEO, ALBERTO MARIA;TONELLI, GUIDO EMILIO;TRIGGIANI, GIUSEPPE;
1990-01-01
Abstract
We have looked for evidence of excited lepton production in Z0 decay observed in the ALEPH detector at LEP. We find no ll gamma gamma events and set new limits at 95% CL on L* masses at 44.6, 44.6 and 41.2 GeV/c2 for e* mu* e tau* respectively. Observed events in the ll gamma channels are consistent with radiative effects and we set limits for the first time on the l*l Z coupling for l* masses in the range up to 86 GeV/c2.File in questo prodotto:
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