We have measured the branching fractions for the hadronic tau decays, tau --> pi/K n pi(degrees) upsilon (0 less than or equal to n less than or equal to 3), with the L3 detector at LEP. Multiphoton final states are analyzed using the fine-grained, high-resolution electromagnetic calorimeter. The decay channels are identified using a neural network method. The results are: BR(tau --> pi/K upsilon) = (11.82 +/- 0.26 +/- 0.43)%, BR(tau --> pi/K pi(degrees) upsilon) = (25.05 +/- 0.35 +/- 0.50)%, BR(tau --> pi/K2 pi(degrees) upsilon) = (8.88 +/- 0.37 +/- 0.42)%, BR(tau --> pi/K3 pi(degrees) upsilon) = (1.70 +/- 0.24 +/- 0.38)%, where the first error quoted is statistical, the second systematic.

Measurement of Exclusive Branching Fractions of Hadronic One-prong Tau-decays / M. ACCIARRI, A. ADAM, O. ADRIANI, M. AGUILARBENITEZ, S. AHLEN, J. ALCARAZ, A. ALOISIO, G. ALVERSON, M. G. ALVIGGI, G. AMBROSI, Q. AN, H. ANDERHUB, A. L. ANDERSON, V. P. ANDREEV, T. ANGELESCU, L. ANTONOV, D. ANTREASYAN, G. ALKHAZOV, P. ARCE, A. AREFIEV, et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 345:(1995), pp. 93-102. [10.1016/0370-2693(94)01587-3]

Measurement of Exclusive Branching Fractions of Hadronic One-prong Tau-decays

ADRIANI, OSCAR;D'ALESSANDRO, RAFFAELLO;M. LENTI;
1995

Abstract

We have measured the branching fractions for the hadronic tau decays, tau --> pi/K n pi(degrees) upsilon (0 less than or equal to n less than or equal to 3), with the L3 detector at LEP. Multiphoton final states are analyzed using the fine-grained, high-resolution electromagnetic calorimeter. The decay channels are identified using a neural network method. The results are: BR(tau --> pi/K upsilon) = (11.82 +/- 0.26 +/- 0.43)%, BR(tau --> pi/K pi(degrees) upsilon) = (25.05 +/- 0.35 +/- 0.50)%, BR(tau --> pi/K2 pi(degrees) upsilon) = (8.88 +/- 0.37 +/- 0.42)%, BR(tau --> pi/K3 pi(degrees) upsilon) = (1.70 +/- 0.24 +/- 0.38)%, where the first error quoted is statistical, the second systematic.
1995
345
93
102
M. ACCIARRI;A. ADAM;O. ADRIANI;M. AGUILARBENITEZ;S. AHLEN;J. ALCARAZ;A. ALOISIO;G. ALVERSON;M. G. ALVIGGI;G. AMBROSI;Q. AN;H. ANDERHUB;A. ...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/772808
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