Accès ouvert déclaré
2005
article
Search for the decay τ-→4π-3π+(π0)ντ
B Aubert, R Barate, D Boutigny, F Couderc, Y Karyotakis, Jp Lees, V Poireau, V Tisserand, A Zghiche, E Grauges, A Palano, M Pappagallo, A Pompili, JC Chen, ND Qi, G Rong, P Wang, Zhu Ys, G Eigen, I Ofte, B Stugu, GS Abrams, M Battaglia, AW Borgland, AB Breon, DN Brown, J Button-Shafer, RN Cahn, E Charles, C. Day, MS Gill, AV Gritsan, Y Groysman, RG Jacobsen, Rw Kadel, J Kadyk, LT Kerth, YG Kolomensky, G Kukartsev, G Lynch, LM Mir, PJ Oddone, Tj Orimoto, M Pripstein, NA Roe, MT Ronan, WA Wenzel, M Barrett, KE Ford, TJ Harrison, AJ Hart, CM Hawkes, SE Morgan, AT Watson, M Fritsch, K Goetzen, T Held, H Koch, B Lewandowski, M Pelizaeus, K Peters, T Schroeder, M Steinke, JT Boyd, JP Burke, N Chevalier, WN Cottingham, MP Kelly, T Cuhadar-Donszelmann, C Hearty, NS Knecht, Ts Mattison, JA McKenna, A Khan, P Kyberd, L Teodorescu, AE Blinov, VE Blinov, AD Bukin, VP Druzhinin, VB Golubev, EA Kravchenko, AP Onuchin, SI Serednyakov, YI Skovpen, Ep Solodov, AN Yushkov, D Best, M Bondioli, M Bruinsma, M Chao, I Eschrich, D Kirkby, AJ Lankford, M Mandelkern, RK Mommsen, W Roethel, Dp Stoker, C Buchanan, BL Hartfiel
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Le résumé fourni par la source
A search for the decay of the τ lepton to seven charged pions and one or zero π0 mesons was performed using the BABAR detector at the PEP-II asymmetric-energy e+e- collider. The analysis uses 232.2fb-1 of data at center-of-mass energies on or near the Υ(4S) resonance. We observe 24 events with an expected background of 21.6±1.3 events. Without evidence for a signal, we calculate an upper limit of B(τ-→4π-3π+(π0) ντ) < 3.0×10-7 at 90% confidence level. This is an improvement by nearly an order of magnitude over the previously established limit. In addition, we set upper limits for the exclusive decays τ-→4π-3π+ντ and τ-→4π-3π+π0ντ. © 2005 The American Physical Society.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
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Les sujets associés
Quantum Chromodynamics and Particle InteractionsParticle physics theoretical and experimental studiesNeutrino Physics Research