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., A.B., Aloisio, A., Alviggi, M., Chiefari, G., Merola, L., Napolitano, M., Paternoster, G., Patricelli, S., Sciacca, C.. - 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.File in questo prodotto:
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