Final states with charged kaons in three-prong tau decays are studied by exploiting the particle identification from the dE/dx measurement. The results are based on a sample of about 1.6 x 10(5) detected tau pairs collected with the ALEPH detector between 1991 and 1995 around the Z peak. The following branching ratios have been measured: B(tau(-) --> K(-)K(+)pi(-)nu(tau)) = (1.63 +/- 0.21 +/- 0.17) x 10(-3), B(tau(-) --> K(-)pi(+)pi(-)nu(tau)) = (2.14 +/- 0.37 +/- 0.29) x 10(-3), B(tau(-) --> K(-)K(+)pi(-)pi(0) nu(tau)) = (0.75 +/- 0.29 +/- 0.15) x 10(-3), and B(tau(-) --> K(-)pi(+)pi(-)pi(0) nu(tau)) = (0.61 +/- 0.39 +/- 0.18) x 10(-3). The first two measurements are more precise than the current world averages, while the last two channels are investigated for the first time. The 95% C.L. upper limit on the branching ratio for the decay tau(-) --> K(-)K(+)K(-)nu(tau) is 0.19 x 10(-3). A study of intermediate states occurring in the K(-)K(+)pi(-)nu(tau), and K(-)pi(+)pi(-)nu(tau), decays is also presented.

Three-prong tau decays with charged kaons / Barate, R., Buskulic, D., Decamp, D., Ghez, P., Goy, C., Lees, J.p., Lucotte, A., Minard, M.n., Nief, J.y., Pietrzyk, B., Casado, M.p., Chmeissani, M., Comas, P., Crespo, J.m., Delfino, M., Fernandez, E., Fernandez Bosman, M., Garrido, L., Juste, A., Martinez, M., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - STAMPA. - 1:1-2(1998), pp. 65-79. [10.1007/BF01245798]

Three-prong tau decays with charged kaons

CREANZA, Donato Maria;IASELLI, Giuseppe;MAGGI, Giorgio Pietro;
1998

Abstract

Final states with charged kaons in three-prong tau decays are studied by exploiting the particle identification from the dE/dx measurement. The results are based on a sample of about 1.6 x 10(5) detected tau pairs collected with the ALEPH detector between 1991 and 1995 around the Z peak. The following branching ratios have been measured: B(tau(-) --> K(-)K(+)pi(-)nu(tau)) = (1.63 +/- 0.21 +/- 0.17) x 10(-3), B(tau(-) --> K(-)pi(+)pi(-)nu(tau)) = (2.14 +/- 0.37 +/- 0.29) x 10(-3), B(tau(-) --> K(-)K(+)pi(-)pi(0) nu(tau)) = (0.75 +/- 0.29 +/- 0.15) x 10(-3), and B(tau(-) --> K(-)pi(+)pi(-)pi(0) nu(tau)) = (0.61 +/- 0.39 +/- 0.18) x 10(-3). The first two measurements are more precise than the current world averages, while the last two channels are investigated for the first time. The 95% C.L. upper limit on the branching ratio for the decay tau(-) --> K(-)K(+)K(-)nu(tau) is 0.19 x 10(-3). A study of intermediate states occurring in the K(-)K(+)pi(-)nu(tau), and K(-)pi(+)pi(-)nu(tau), decays is also presented.
1998
Three-prong tau decays with charged kaons / Barate, R., Buskulic, D., Decamp, D., Ghez, P., Goy, C., Lees, J.p., Lucotte, A., Minard, M.n., Nief, J.y., Pietrzyk, B., Casado, M.p., Chmeissani, M., Comas, P., Crespo, J.m., Delfino, M., Fernandez, E., Fernandez Bosman, M., Garrido, L., Juste, A., Martinez, M., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - STAMPA. - 1:1-2(1998), pp. 65-79. [10.1007/BF01245798]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/3081
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