Search for tau- ---> 4pi- 3pi+ (pi0) nu/tau Decays

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A search for the decay of the {tau} lepton to seven charged pions and at most one {pi}{sup 0} was performed using the BABAR detector at the PEP-II e{sup +}e{sup -} collider. The analysis uses data recorded on and near the {Upsilon}(4S) resonance between 1999 and 2003, a total of 124.3 fb{sup -1}. They observe 7 events with an expected background of 11.9 {+-} 2.2 events and calculate a preliminary upper limit of BR({tau}{sup -} {yields} 4{pi}{sup -} 3{pi}{sup +}({pi}{sup 0}){nu}{sub {tau}}) < 2.7 x 10{sup -7} at 90% CL. This is a significant improvement over the previous limit established ... continued below

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6 pages

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Ter-Antonian, R.; Kass, R.; Allmendinger, T.; U., /Ohio State; Hast, C. & /SLAC June 21, 2005.

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A search for the decay of the {tau} lepton to seven charged pions and at most one {pi}{sup 0} was performed using the BABAR detector at the PEP-II e{sup +}e{sup -} collider. The analysis uses data recorded on and near the {Upsilon}(4S) resonance between 1999 and 2003, a total of 124.3 fb{sup -1}. They observe 7 events with an expected background of 11.9 {+-} 2.2 events and calculate a preliminary upper limit of BR({tau}{sup -} {yields} 4{pi}{sup -} 3{pi}{sup +}({pi}{sup 0}){nu}{sub {tau}}) < 2.7 x 10{sup -7} at 90% CL. This is a significant improvement over the previous limit established by the CLEO Collaboration.

Physical Description

6 pages

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  • Journal Name: Nucl.Phys.Proc.Suppl.144:21-26,2005; Conference: Prepared for 8th International Workshop on Tau Lepton Physics (Tau 04), Nara, Japan, 14-17 Sep 2004

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  • Report No.: SLAC-PUB-11291
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 890356
  • Archival Resource Key: ark:/67531/metadc873421

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  • June 21, 2005

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  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 7, 2016, 9:05 p.m.

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Ter-Antonian, R.; Kass, R.; Allmendinger, T.; U., /Ohio State; Hast, C. & /SLAC. Search for tau- ---> 4pi- 3pi+ (pi0) nu/tau Decays, article, June 21, 2005; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc873421/: accessed November 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.