Hadronic structure in the decay {tau}{sup -}{yields}{pi}{sup -}{pi}{sup 0}{nu}{sub {tau}}
- University of Minnesota, Minneapolis, Minnesota 55455 (United States)
- 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, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 61; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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