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Search for the decay τ-→3π^-2π^+2π^0ν_τ

Aubert, B. and Albert, J. and Chen, E. and Dvoretskii, A. and Hitlin, D. G. and Narsky, I. and Piatenko, T. and Porter, F. C. and Ryd, A. and Samuel, A. (2006) Search for the decay τ-→3π^-2π^+2π^0ν_τ. Physical Review D, 73 (11). Art. No. 112003. ISSN 2470-0010. https://resolver.caltech.edu/CaltechAUTHORS:20110215-082104209

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Abstract

A search for the decay of the τ lepton to five charged and two neutral pions is performed using data collected by the BABAR detector at the PEP-II asymmetric-energy e^+e^- collider. The analysis uses 232  fb^(-1) of data at center-of-mass energies on or near the Υ(4S) resonance. We observe 10 events with an expected background of 6.5_(-1.4)^(+2.0) events. In the absence of a signal, we set the limit on the branching ratio B(τ-→3π^-2π^+2π^0ν_τ)<3.4×10^(-6) at the 90% confidence level. This is a significant improvement over the previously established limit. In addition, we search for the decay mode τ-→2ωπ-ν_τ. We observe 1 event with an expected background of 0.4+1.0/-0.4 events and calculate the upper limit B(τ-→2ωπ-ν_τ)<5.4×10^(-7) at the 90% confidence level. This is the first upper limit for this mode.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevD.73.112003DOIUNSPECIFIED
http://link.aps.org/doi/10.1103/PhysRevD.73.112003PublisherUNSPECIFIED
http://prd.aps.org/abstract/PRD/v73/i11/e112003PublisherUNSPECIFIED
ORCID:
AuthorORCID
Hitlin, D. G.0000-0003-4028-6982
Porter, F. C.0000-0003-1948-8889
Additional Information:© 2006 The American Physical Society. Received 7 April 2006; published 9 June 2006. We are grateful for the extraordinary contributions of our PEP-II colleagues in achieving the excellent luminosity and machine conditions that have made this work possible. The success of this project also relies critically on the expertise and dedication of the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and the kind hospitality extended to them. This work is supported by the US Department of Energy and National Science Foundation, the Natural Sciences and Engineering Research Council (Canada), Institute of High Energy Physics (China), the Commissariat à l’Energie Atomique and Institut National de Physique Nucléaire et de Physique des Particules (France), the Bundesministerium für Bildung und Forschung and Deutsche Forschungsgemeinschaft (Germany), the Istituto Nazionale di Fisica Nucleare (Italy), the Foundation for Fundamental Research on Matter (The Netherlands), the Research Council of Norway, the Ministry of Science and Technology of the Russian Federation, and the Particle Physics and Astronomy Research Council (United Kingdom). Individuals have received support from CONACyT (Mexico), the Marie-Curie IEF (European Union), the A. P. Sloan Foundation, the Research Corporation, and the Alexander von Humboldt Foundation.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
NSFUNSPECIFIED
Natural Sciences and Engineering Research Council (Canada)UNSPECIFIED
Institute of High Energy Physics (China)UNSPECIFIED
Commissariat à l’Energie Atomique (CEA) (France)UNSPECIFIED
Institut National de Physique Nucléaire et de Physique des Particules (France)UNSPECIFIED
Bundesministerium für Bildung und Forschung (German: Federal Ministry of Education and Research; Bonn, Germany)UNSPECIFIED
Deutsche Forschungsgemeinschaft (Germany)UNSPECIFIED
Istituto Nazionale di Fisica Nucleare (Italy)UNSPECIFIED
Foundation for Fundamental Research on Matter (The Netherlands)UNSPECIFIED
Research Council of NorwayUNSPECIFIED
Ministry of Science and Technology of the Russian FederationUNSPECIFIED
Particle Physics and Astronomy Research Council (UK)UNSPECIFIED
CONACyT (Mexico)UNSPECIFIED
Marie-Curie IEF (European Union)UNSPECIFIED
A. P. Sloan FoundationUNSPECIFIED
Research CorporationUNSPECIFIED
Alexander von Humboldt FoundationUNSPECIFIED
Issue or Number:11
Classification Code:PACS: 13.35.Dx, 13.66.De, 13.85.Rm
Record Number:CaltechAUTHORS:20110215-082104209
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20110215-082104209
Official Citation:Search for the decay τ-→3π-2π+2π0ντ B. Aubert et al. (BABAR Collaboration) Published 9 June 2006 (8 pages) 112003
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:22182
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:15 Feb 2011 17:44
Last Modified:09 Mar 2020 13:18

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