Structure functions in the decay {tau}{sup {+-}}{yields}{pi}{sup {+-}}{pi}{sup 0}{pi}{sup 0}{nu}{sub {tau}}

Journal Article · Wed Mar 01 04:00:00 EST 2000 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.61.052004· OSTI ID:20215915

Browder, T E ^[1]; Li, Y ^[1]; Rodriguez, J L ^[1]; Yamamoto, H ^[1]; Bergfeld, T ^[2]; Eisenstein, B I ^[2]; Ernst, J ^[2]; Gladding, G E ^[2]; Gollin, G D ^[2]; Hans, R M ^[2]

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1. University of Hawaii at Manoa, Honolulu, Hawaii 96822 (United States)
2. University of Illinois, Urbana-Champaign, Illinois 61801 (United States)

Using the CLEO II detector operating at the Cornell Electron Storage Ring (CESR) e{sup +}e{sup -} collider, we have measured the structure functions in the decay {tau}{sup {+-}}{yields}{pi}{sup {+-}}{pi}{sup 0}{pi}{sup 0}{nu}{sub {tau}}, based on a sample corresponding to 4x10{sup 6} produced {tau}-pair events. We determine the integrated structure functions, which depend only on the three pion invariant mass, as well as the structure functions differential in the Dalitz plot variables. We extract model independent limits on non-axial-vector contributions from the measured structure functions as less than 16.6% of the total branching fraction, at the 95% confidence level. Separating the non-axial-vector contributions into scalar and vector contributions, we measure that scalars (vectors) contribute with less than 9.4% (7.3%) to the total branching fraction, at the 95% confidence level. (c) 2000 The American Physical Society.

• OSTI ID: 20215915
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 61; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
DALITZ PLOT
EXPERIMENTAL DATA
PARTICLE DECAY
PIONS MINUS
PIONS NEUTRAL
PIONS PLUS
STRUCTURE FUNCTIONS
TAU NEUTRINOS
TAU PARTICLES