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Search for the A/sub 1/ in tau. -->. nu. /sub tau/rho. pi

Journal Article · · Phys. Rev., D; (United States)
;
Within the context of current algebra, we analyze the possibility of observing the elusive A/sub 1/ meson (J/sup P/C = 1/sup + +/) in the heavy-lepton decay tau/sup + -/ ..-->.. ..nu../sub tau/rho/sup 0/..pi../sup + -/. In our model the form factors for the decay amplitude are then completely determined in terms of the A/sub 1/ mass and width so that we are able to predict both the branching ratio and rho..pi.. mass spectrum for this decay. We find that the data are compatible with a wide range of A/sub 1/ parameters including the possibility that there is no A/sub 1/ contribution at all to this decay mode. Only a modest increase in experimental precision, however, would provide a stringent test of the current-algebra model and, if successful, yield an accurate determination of the parameters of the A/sub 1/.
Research Organization:
University of Minnesota, School of Physics and Astronomy, Minneapolis, Minnesota 55455
OSTI ID:
6647568
Journal Information:
Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 18:7; ISSN PRVDA
Country of Publication:
United States
Language:
English

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Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
A RESONANCES
A1-1070 RESONANCES
AMPLITUDES
BOSONS
BRANCHING RATIO
CURRENT ALGEBRA
DECAY
DECAY AMPLITUDES
ELEMENTARY PARTICLES
FERMIONS
HADRONS
HEAVY LEPTONS
LEPTONS
MATHEMATICAL MODELS
MESON RESONANCES
MESONS
PARTICLE DECAY
PARTICLE MODELS
POSTULATED PARTICLES
RESONANCE PARTICLES
SEMILEPTONIC DECAY
TAU PARTICLES
TRANSITION AMPLITUDES
WEAK PARTICLE DECAY