Confronting generalized hidden local symmetry chiral model with the ALEPH data on the decay {tau}{sup -{yields}{pi}+{pi}-{pi}-{nu}}{sub {tau}}

Journal Article · Fri Oct 01 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.076005· OSTI ID:21432333

Achasov, N N; Kozhevnikov, A A ^[1]

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1. Laboratory of Theoretical Physics, S. L. Sobolev Institute for Mathematics, 630090, Novosibirsk (Russian Federation)

The generalized hidden local symmetry (GHLS) model is the chiral model of pseudoscalar, vector, and axial vector mesons and their interactions. It contains also the couplings of strongly interacting particles with electroweak gauge bosons. Here, GHLS model is confronted with the ALEPH data on the decay {tau}{sup -{yields}{pi}-{pi}-{pi}+{nu}}{sub {tau}}. It is shown that the invariant mass spectrum of final pions in this decay calculated in GHLS framework with the single a{sub 1}(1260) resonance disagrees with the experimental data at any reasonable number of free GHLS parameters. Two modifications of GHLS model based on inclusion of two additional heavier axial vector mesons are studied. One of them, which gives a good description of the ALEPH data with all the parameters kept free, is shown to result in very large {Gamma}{sub a{sub 1}{sup {+-}}{sub {yields}{pi}}{sup {+-}}{sub {gamma}}}partial width. The other scheme with the GHLS parameters fixed in a way that the universality is preserved and the observed central value of {Gamma}{sub a{sub 1}{sup {+-}}{sub {yields}{pi}}{sup {+-}}{sub {gamma}}}is reached, which results in a good description of the three pion spectrum in {tau}{sup -{yields}{pi}+{pi}-{pi}-{nu}}{sub {tau}}decay.

• OSTI ID: 21432333
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 7; Other Information: DOI: 10.1103/PhysRevD.82.076005; (c) 2010 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
A1-1260 MESONS
AXIAL VECTOR MESONS
CHIRAL SYMMETRY
CHIRALITY
COUPLING
INTERACTIONS
MASS SPECTRA
MODIFICATIONS
PARTICLE DECAY
PARTICLES
PIONS MINUS
PIONS PLUS
PSEUDOSCALAR MESONS
RESONANCE
STRONG INTERACTIONS
SYMMETRY
TAU NEUTRINOS
TAU PARTICLES
VECTOR MESONS
WEINBERG-SALAM GAUGE MODEL
BASIC INTERACTIONS
BOSONS
DECAY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRONS
HEAVY LEPTONS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MESONS
NEUTRINOS
PARTICLE MODELS
PARTICLE PROPERTIES
PIONS
QUANTUM FIELD THEORY
SPECTRA
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES