The branching fraction of the tau(-)-> 3h(-)2h(+)nu(tau) decay (h=pi,K) is measured with the BABAR detector to be (8.56 +/- 0.05 +/- 0.42)x10(-4), where the first error is statistical and the second systematic. The observed structure of this decay is significantly different from the phase space prediction, with the rho resonance playing a strong role. The decay tau(-)-> f(1)(1285)pi(-)nu(tau), with the f(1)(1285) meson decaying to four charged pions, is observed and the branching fraction is measured to be (3.9 +/- 0.7 +/- 0.5)x10(-4).
Study of the tau(-)-> 3h(-)2h(+)nu(tau) decay
ANDREOTTI, Mirco;AZZOLINI, Virginia;CALABRESE, Roberto;CIBINETTO, Gianluigi;LUPPI, Eleonora;NEGRINI, Matteo;
2005
Abstract
The branching fraction of the tau(-)-> 3h(-)2h(+)nu(tau) decay (h=pi,K) is measured with the BABAR detector to be (8.56 +/- 0.05 +/- 0.42)x10(-4), where the first error is statistical and the second systematic. The observed structure of this decay is significantly different from the phase space prediction, with the rho resonance playing a strong role. The decay tau(-)-> f(1)(1285)pi(-)nu(tau), with the f(1)(1285) meson decaying to four charged pions, is observed and the branching fraction is measured to be (3.9 +/- 0.7 +/- 0.5)x10(-4).File in questo prodotto:
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