Effect of the a{sub 1}(1260) resonance on the {rho} {sup {yields}} 4{pi} and {omega},o {sup {yields}} 5 {pi} decay widths

Journal Article · Wed Feb 15 00:00:00 EST 2006 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778806020141· OSTI ID:21076113

Achasov, N. N., E-mail: [e-mail]; Kozhevnikov, A. A. ^[1]

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1. Russian Academy of Sciences, Sobolev Institute of Mathematics, Siberian Division (Russian Federation), E-mail: [e-mail]

The contribution of the a{sub 1}(1260) meson to the {rho}(770) {sup {yields}} 4{pi},{omega}(782) {sup {yields}} 5{pi}, and o(1020) {sup {yields}} 5{pi} decay amplitudes is analyzed on the basis of the chiral model of pseudoscalar, vector, and axial-vector mesons that is based on generalized hidden local symmetry and which is supplemented with terms induced by the Wess-Zumino anomaly. It is shown that the intensities of the above decays are enhanced upon taking into account the a{sub 1} meson in intermediate states. For the a{sub 1}-meson mass m{sub a{sub 1}} varying from 1.23 GeV to m{sub p}{radical}2=1.09 GeV, the enhancement factor grows from 1.3 to 1.9.

• OSTI ID: 21076113
• Journal Information: Physics of Atomic Nuclei, Vol. 69, Issue 2; Other Information: DOI: 10.1134/S1063778806020141; Copyright (c) 2006 Nauka/Interperiodica; Article Copyright (c) 2006 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7788
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
A1-1260 MESONS
CHIRALITY
DECAY AMPLITUDES
GEV RANGE 01-10
INTERMEDIATE STATE
MASS
OMEGA-782 MESONS
PARTICLE DECAY
PIONS
RESONANCE
RHO-770 MESONS
SYMMETRY