Hadronic structure in the decay {tau}{sup -}{yields}{pi}{sup -}{pi}{sup 0}{nu}{sub {tau}}

Journal Article · Thu Jun 01 00:00:00 EDT 2000 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.61.112002· OSTI ID:20216458

Anderson, S ^[1]; Frolov, V V ^[1]; Kubota, Y ^[1]; Lee, S J ^[1]; Mahapatra, R ^[1]; O'Neill, J J ^[1]; Poling, R ^[1]; Riehle, T ^[1]; Smith, A ^[1]; Ahmed, S ^[2]

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1. University of Minnesota, Minneapolis, Minnesota 55455 (United States)
2. State University of New York at Albany, Albany, New York 12222 (United States)

We report on a study of the invariant mass spectrum of the hadronic system in the decay {tau}{sup -}{yields}{pi}{sup -}{pi}{sup 0}{nu}{sub {tau}}. This study was performed with data obtained with the CLEO II detector operating at the CESR e{sup +}e{sup -} collider. We present fits to phenomenological models in which resonance parameters associated with the {rho}(770) and {rho}(1450) mesons are determined. The {pi}{sup -}{pi}{sup 0} spectral function inferred from the invariant mass spectrum is compared with data on e{sup +}e{sup -}{yields}{pi}{sup +}{pi}{sup -} as a test of the conserved vector current theorem. We also discuss the implications of our data with regard to estimates of the hadronic contribution to the muon anomalous magnetic moment. (c) 2000 The American Physical Society.

• OSTI ID: 20216458
• Journal Information: Physical Review. D, Particles Fields, Vol. 61, Issue 11; Other Information: PBD: 1 Jun 2000; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
TAU PARTICLES
PIONS MINUS
PIONS NEUTRAL
TAU NEUTRINOS
ELECTRON-POSITRON INTERACTIONS
RHO-1450 MESONS
RHO-770 MESONS
VECTOR CURRENTS
MASS SPECTRA
MAGNETIC MOMENTS
PARTICLE DECAY
EXPERIMENTAL DATA
THEORETICAL DATA