We have searched for excited taus from Z 0 decay in the channels e +e -→τ* +τ* -→τ +τ -γγ and e +e -→ττ*→τ +τ -γ, using the L3 detector at LEP. Using the τ* pair production channel, we can exclude a τ* up to a mass of 45.5 GeV at 95% confidence level. We have also determined upper limits on the ττZ 0 and ττ*γ couplings as a function of m τ* up to 89.3 GeV.
Search for excited taus from Z 0 decays / A. O., Aguilar Benitez; Aloisio, Alberto; Alviggi, Mariagrazia; Chiefari, Giovanni; Merola, Leonardo; Napolitano, Marco; Paternoster, Giovanni; Patricelli, Sergio; Sciacca, Crisostomo. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 250:(1990), pp. 205-211.
Search for excited taus from Z 0 decays
ALOISIO, ALBERTO;ALVIGGI, MARIAGRAZIA;CHIEFARI, GIOVANNI;MEROLA, LEONARDO;NAPOLITANO, MARCO;PATERNOSTER, GIOVANNI;PATRICELLI, SERGIO;SCIACCA, CRISOSTOMO
1990
Abstract
We have searched for excited taus from Z 0 decay in the channels e +e -→τ* +τ* -→τ +τ -γγ and e +e -→ττ*→τ +τ -γ, using the L3 detector at LEP. Using the τ* pair production channel, we can exclude a τ* up to a mass of 45.5 GeV at 95% confidence level. We have also determined upper limits on the ττZ 0 and ττ*γ couplings as a function of m τ* up to 89.3 GeV.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
