Study of tau decays to six pions and a neutrino

Study of tau decays to six pions and a neutrino

The tau decays to six-pion final states have been studied with the CLEO detector at the Cornell Electron Storage Ring. The measured branching fractions are B(tau(-)-->2pi(-)pi(+)3pi(0)nu(tau)) = (2.2+/-0.3+/-0.4)x10(-4) and B(tau(-)-->3pi(-)2pi(+)pi(0)nu(tau)) = (1.7+/-0.2+/-0.2)x10(-4). A sea...

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Veröffentlicht in:Physical review letters 2001-05, Vol.86 (20), p.4467-4471
Hauptverfasser: Anastassov, A, Duboscq, J E, Eckhart, E, Gan, K K, Gwon, C, Hart, T, Honscheid, K, Hufnagel, D, Kagan, H, Kass, R, Pedlar, T K, Schwarthoff, H, Thayer, J B, von Toerne, E, Zoeller, M M, Richichi, S J, Severini, H, Skubic, P, Undrus, A, Chen, S, Fast, J, Hinson, J W, Lee, J, Miller, D H, Shibata, E I, Shipsey, I P, Pavlunin, V, Cronin-Hennessy, D, Lyon, A L, Thorndike, E H, Jessop, C P, Savinov, V, Coan, T E, Fadeyev, V, Maravin, Y, Narsky, I, Stroynowski, R, Ye, J, Wlodek, T, Artuso, M, Ayad, R, Boulahouache, C, Bukin, K, Dambasuren, E, Karamov, S, Majumder, G, Moneti, G C, Mountain, R, Schuh, S, Skwarnicki, T, Stone, S, Viehhauser, G, Wang, J C, Wolf, A, Wu, J, Kopp, S, Mahmood, A H, Csorna, S E, Danko, I, McLean, K W, Xu, Z, Godang, R, Bonvicini, G, Cinabro, D, Dubrovin, M, McGee, S, Zhou, G J, Lipeles, E, Pappas, S P, Schmidtler, M, Shapiro, A, Sun, W M, Weinstein, A J, Würthwein, F, Jaffe, D E, Masek, G, Paar, H P, Potter, E M, Prell, S, Asner, D M, Eppich, A, Hill, T S, Morrison, R J, Briere, R A, Chen, G P, Ford, W T, Gritsan, A, Roy, J, Smith, J G, Alexander, J P, Baker, R, Bebek, C, Berger, B E, Berkelman, K, Blanc, F, Boisvert, V, Cassel, D G, Drell, P S, Ecklund, K M, Ehrlich, R
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Sprache:eng
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Zusammenfassung:The tau decays to six-pion final states have been studied with the CLEO detector at the Cornell Electron Storage Ring. The measured branching fractions are B(tau(-)-->2pi(-)pi(+)3pi(0)nu(tau)) = (2.2+/-0.3+/-0.4)x10(-4) and B(tau(-)-->3pi(-)2pi(+)pi(0)nu(tau)) = (1.7+/-0.2+/-0.2)x10(-4). A search for substructure in these decays shows that they are saturated by intermediate states with eta or omega mesons. We present the first observation of the decay tau(-)-->2pi(-)pi(+)omega(nu)tau and the branching fraction is measured to be (1.2+/-0.2+/-0.1)x10(-4). The measured branching fractions are in good agreement with the isospin expectations but somewhat below the conserved-vector-current predictions.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.86.4467