From a sample of about 75000 tau decays measured in the ALEPH detector, 1-prong charged kaon decays are identified by the dE/dx measurement in the central detector. The resulting branching ratios for the inclusive and exclusive modes are: B(tau - -> nu(tau)K- greater-than-or-equal-to 0 pi0 greater-than-or-equal-to 0 K0) = (1.60 +/- 0.07 +/- 0.12)%, B(tau - -> nu(tau)K-) = (0.64 +/- 0.05 +/- 0.05)%, B(tau - -> nu(tau)K-pi0) = (0.53 +/- 0.05 +/- 0.07)% and B(tau - -> nu(tau)K-pi0pi0) = (0.04 +/- 0.03 +/- 0.02)%. Exclusive modes are corrected for measured K(L)0 production. The rate for tau --> nu(tau)K- agrees well with the prediction based on tau - mu universality.
One-prong tau decays into charged kaons
BATIGNANI, GIOVANNI;CIOCCI, MARIA AGNESE;FERRANTE, ISIDORO;FIDECARO, FRANCESCO;FORTI, FRANCESCO;GIORGI, MARCELLO;MESSINEO, ALBERTO MARIA;RIZZO, GIULIANA;TONELLI, GUIDO EMILIO;G. TRIGGIANI;
1994-01-01
Abstract
From a sample of about 75000 tau decays measured in the ALEPH detector, 1-prong charged kaon decays are identified by the dE/dx measurement in the central detector. The resulting branching ratios for the inclusive and exclusive modes are: B(tau - -> nu(tau)K- greater-than-or-equal-to 0 pi0 greater-than-or-equal-to 0 K0) = (1.60 +/- 0.07 +/- 0.12)%, B(tau - -> nu(tau)K-) = (0.64 +/- 0.05 +/- 0.05)%, B(tau - -> nu(tau)K-pi0) = (0.53 +/- 0.05 +/- 0.07)% and B(tau - -> nu(tau)K-pi0pi0) = (0.04 +/- 0.03 +/- 0.02)%. Exclusive modes are corrected for measured K(L)0 production. The rate for tau --> nu(tau)K- agrees well with the prediction based on tau - mu universality.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.