Study of the Decay {tau}{sup -} {yields} 2 {pi}{sup -}{pi}{sup +}3{pi}{sup 0}{nu}{sub {tau}}

Technical Report · Mon May 05 04:00:00 EDT 2003

DOI:https://doi.org/10.2172/813068· OSTI ID:813068

Jessop, Colin P ^[1]

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1. SLAC

The decay {tau}{sup -} {yields} 2{pi}{sup -}{pi}{sup +}3{pi}{sup 0}{nu}{sub {tau}} has been studied with the CLEO II detector at the Cornell Electron Storage Ring (CESR). The branching fraction is measured to be (2.85 {+-} 0.56 {+-} 0.51) x 10{sup -4}. The result is in good agreement with the isospin expectation but somewhat below the Conserved-Vector-Current (CVC) prediction. We have searched for resonance substructure in the decay. Within the statistical precision, the decay is saturated by the channels {tau}{sup -} {yields} {pi}{sup -}2{pi}{sup 0}{omega}{nu}{sub {tau}}, 2{pi}{sup -}{pi}{sup +}{eta}{nu}{sub {tau}}, and {pi}{sup -}2{pi}{sup 0}{eta}{nu}{sub {tau}}.. This is the first observation of this {omega} decay mode and the branching fraction is measured to be (1.89{sub -0.67}{sup +0.74} {+-} 0.40) x 10{sup -4}.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (US)
• Sponsoring Organization: USDOE Office of Science (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 813068
• Report Number(s): SLAC-PUB-9766
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCURACY
DECAY
ELECTRONS
FORECASTING
ISOSPIN
RESONANCE
STORAGE RINGS