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Current-algebra calculation of the decay tau. -->. 3. pi nu

Journal Article · · Phys. Rev. Lett.; (United States)
;
A fit to the integrated rate and 3..pi.. mass distribution of the decay mode tau/sup +/ ..-->.. ..pi../sup +/..pi../sup +/..pi../sup -/nu-bar/sub tau/ has been performed using hard-pion current algebra, including the approximate imposition of unitarity. We find that the existence of an A/sub 1/ with low mass (m/sub A/ = 1.1 GeV) and narrow width (GAMMA/sub A//sup tot/ = 150 MeV, GAMMA (A/sub 1/ ..-->.. rho..pi..) = 100 MeV) is consistent with the data if there is an appreciable non-rho..pi.. contribution to the matrix element <3..pi..vertical-barA/sub ..mu../vertical-bar0>. Such a contact term is predicted to exist by current algebra.
Research Organization:
Department of Physics, Northeastern University, Boston, Massachusetts 02115
OSTI ID:
6322969
Journal Information:
Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 42:6; ISSN PRLTA
Country of Publication:
United States
Language:
English

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Related Subjects

645203* -- High Energy Physics-- Particle Interactions &amp; Properties-Theoretical-- Weak Interactions &amp; Properties
645302 -- High Energy Physics-- Particle Invariance Principles &amp; Symmetries-- Applications to Electromagnetic &amp; Weak Interactions-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
A RESONANCES
A1-1070 RESONANCES
ALGEBRAIC CURRENTS
AXIAL-VECTOR CURRENTS
BOSONS
CURRENT ALGEBRA
CURRENTS
DATA
DATA FORMS
DECAY
ELEMENTARY PARTICLES
FERMIONS
GRAPHS
HADRONS
HEAVY LEPTONS
INFORMATION
LEPTONS
MASS SPECTRA
MASSLESS PARTICLES
MATRIX ELEMENTS
MESON RESONANCES
MESONS
NEUTRINOS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE PROPERTIES
PARTICLE WIDTHS
PCAC THEORY
PIONS
PIONS MINUS
PIONS PLUS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
SEMILEPTONIC DECAY
SPECTRA
TAU PARTICLES
THEORETICAL DATA
UNITARITY
WEAK PARTICLE DECAY