From a sample of about 75000 tau decays identified with the ALEPH detector, K0 production in 1-prong hadronic decays is investigated by tagging the K(L)0 component in a hadronic calorimeter. Results are given for the final states nu(tau) h- K0 and nu(tau) h- pi0 K0 where the h- is separated into pi and K contributions by means of the dE/dx measurement in the central detector. The resulting branching ratios are: B(tau- -> nu(tau) pi- K0) = (0.88 +/- 0.14 +/- 0.09)%, B(tau - -> nu(tau) K- K0) = (0.29 +/- 0.12 +/- 0.03)%, B(tau- -> nu(tau) pi- pi0 K0) = (0.33 +/- 0.14 +/- 0.07)% and B(tau- -> nu(tau) K- pi0 K0) = (0.05 +/- 0.05 +/- 0.01)%. The K* decay rate in the K0 pi channel agrees with that in the K pi0 mode: the combined value for the branching ratio is B(tau - -> nu(tau)K*-) = (1.45 +/- 0.13 +/- 0.11)%.
K(0) production in one-prong tau decays
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 identified with the ALEPH detector, K0 production in 1-prong hadronic decays is investigated by tagging the K(L)0 component in a hadronic calorimeter. Results are given for the final states nu(tau) h- K0 and nu(tau) h- pi0 K0 where the h- is separated into pi and K contributions by means of the dE/dx measurement in the central detector. The resulting branching ratios are: B(tau- -> nu(tau) pi- K0) = (0.88 +/- 0.14 +/- 0.09)%, B(tau - -> nu(tau) K- K0) = (0.29 +/- 0.12 +/- 0.03)%, B(tau- -> nu(tau) pi- pi0 K0) = (0.33 +/- 0.14 +/- 0.07)% and B(tau- -> nu(tau) K- pi0 K0) = (0.05 +/- 0.05 +/- 0.01)%. The K* decay rate in the K0 pi channel agrees with that in the K pi0 mode: the combined value for the branching ratio is B(tau - -> nu(tau)K*-) = (1.45 +/- 0.13 +/- 0.11)%.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.