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. 2001 May 14;86(20):4467-71.
doi: 10.1103/PhysRevLett.86.4467.

Study of tau decays to six pions and a neutrino

A Anastassov  1 , J E Duboscq, E Eckhart, K K Gan, C Gwon, T Hart, K Honscheid, D Hufnagel, H Kagan, R Kass, T K Pedlar, H Schwarthoff, J B Thayer, E von Toerne, M M Zoeller, S J Richichi, H Severini, P Skubic, A Undrus, S Chen, J Fast, J W Hinson, J Lee, D H Miller, E I Shibata, I P Shipsey, V Pavlunin, D Cronin-Hennessy, A L Lyon, E H Thorndike, C P Jessop, V Savinov, T E Coan, V Fadeyev, Y Maravin, I Narsky, R Stroynowski, J Ye, T Wlodek, M Artuso, R Ayad, C Boulahouache, K Bukin, E Dambasuren, S Karamov, G Majumder, G C Moneti, R Mountain, S Schuh, T Skwarnicki, S Stone, G Viehhauser, J C Wang, A Wolf, J Wu, S Kopp, A H Mahmood, S E Csorna, I Danko, K W McLean, Z Xu, R Godang, G Bonvicini, D Cinabro, M Dubrovin, S McGee, G J Zhou, E Lipeles, S P Pappas, M Schmidtler, A Shapiro, W M Sun, A J Weinstein, F Würthwein, D E Jaffe, G Masek, H P Paar, E M Potter, S Prell, D M Asner, A Eppich, T S Hill, R J Morrison, R A Briere, G P Chen, W T Ford, A Gritsan, J Roy, J G Smith, J P Alexander, R Baker, C Bebek, B E Berger, K Berkelman, F Blanc, V Boisvert, D G Cassel, P S Drell, K M Ecklund, R Ehrlich, A D Foland, P Gaidarev, R S Galik, L Gibbons, B Gittelman, S W Gray, D L Hartill, B K Heltsley, P I Hopman, L Hsu, C D Jones, D L Kreinick, M Lohner, A Magerkurth, T O Meyer, N B Mistry, E Nordberg, J R Patterson, D Peterson, D Riley, A Romano, J G Thayer, D Urner, B Valant-Spaight, A Warburton, P Avery, C Prescott, A I Rubiera, H Stoeck, J Yelton, G Brandenburg, A Ershov, Y S Gao, D Y Kim, R Wilson, T Bergfeld, B I Eisenstein, J Ernst, G E Gladding, G D Gollin, R M Hans, E Johnson, I Karliner, M A Marsh, M Palmer, C Plager, C Sedlack, M Selen, J J Thaler, J Williams, K W Edwards, R Janicek, P M Patel, A J Sadoff, R Ammar, A Bean, D Besson, X Zhao, S Anderson, V V Frolov, Y Kubota, S J Lee, R Mahapatra, J J O'Neill, R Poling, T Riehle, A Smith, C J Stepaniak, J Urheim, S Ahmed, M S Alam, S B Athar, L Jian, L Ling, M Saleem, S Timm, F Wappler; CLEO Collaboration
Affiliations

Study of tau decays to six pions and a neutrino

A Anastassov et al. Phys Rev Lett. .

Abstract

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.

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