WHY IS THE DELTA(983)-]2-GAMMA WIDTH SO SMALL

Authors
DEAKIN AS ELIAS V MCKEON DGC SCADRON MD BRAMON A
Citation
As. Deakin et al., WHY IS THE DELTA(983)-]2-GAMMA WIDTH SO SMALL, Modern physics letters A, 9(26), 1994, pp. 2381-2388
Citations number
18
Categorie Soggetti
Physics, Nuclear","Physics, Particles & Fields","Physycs, Mathematical
Journal title
Modern physics letters A → ACNP
ISSN journal
02177323
Volume
9
Issue
26
Year of publication
1994
Pages
2381 - 2388
Database
ISI
SICI code
0217-7323(1994)9:26<2381:WITDWS>2.0.ZU;2-K
Abstract
The delta0(983) --> 2gamma decay width is calculated in a linear sigma -model framework, in which both quark and meson loops contribute to th e decay amplitude, and compared to the experimental decay width. The r esult is seen to depend strongly on the magnitude of the light quark m ass and is compatible with the present measured rate, up to experiment al uncertainties, for quark masses of order 300 MeV.