Study of [eta][r arrow][pi][sup 0][gamma][gamma] decay using the quark-box diagram

Journal Article · Tue Jun 01 04:00:00 EDT 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.47.4939· OSTI ID:6498050

Ng, J N; Peters, D J ^[1]

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1. Theory Group, TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 (Canada)

We study the decay of [eta] mesons into [pi][sup 0] and a photon pair via the quark-box mechanism in a phenomenological quark model. The main parameters of the model are the [eta][ital qq] and [pi][ital qq] couplings, which are fixed by the [eta][r arrow][gamma][gamma] and [pi][sup 0][r arrow][gamma][gamma] decays. With constituent quark masses of 300 MeV for [ital u] and [ital d] quarks we find the width to be 0.70 eV, in good agreement with the experimental value of 0.84[plus minus]0.18 eV. In contrast, chiral perturbation theory gives a width of 0.42 eV. A detailed comparison with the vector-meson dominance model is also given.

• OSTI ID: 6498050
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 47:11; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662390* -- Electromagnetic Processes & Properties-- (1992-)
662420 -- Properties of Mesons & Meson Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
COMPOSITE MODELS
DECAY
ELEMENTARY PARTICLES
ETA MESONS
HADRONS
MATHEMATICAL MODELS
MESONS
PARTICLE DECAY
PARTICLE MODELS
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
QUARK MODEL
RADIATIVE DECAY
VECTOR DOMINANCE MODEL