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)%.
1994
Buskulic, D.; Casper, D.; Debonis, I.; Decamp, D.; Ghez, P.; Goy, C.; Lees, J. P.; Minard, M. N.; Odier, P.; Pietrzyk, B.; Ariztizabal, F.; Chmeissani...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/828549
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