SUPPRESSION OF PI-NN-ASTERISK COUPLING AND CHIRAL-SYMMETRY

Authors
JIDO D OKA M HOSAKA A
Citation
D. Jido et al., SUPPRESSION OF PI-NN-ASTERISK COUPLING AND CHIRAL-SYMMETRY, Physical review letters, 80(3), 1998, pp. 448-451
Citations number
16
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
80
Issue
3
Year of publication
1998
Pages
448 - 451
Database
ISI
SICI code
0031-9007(1998)80:3<448:SOPCAC>2.0.ZU;2-2
Abstract
Meson-baryon couplings between positive and negative parity baryons ar e investigated using two-point correlation functions in the soft meson limit. We find that the pi NN coupling vanishes due to chiral symmet ry while the eta NN coupling remains finite. We perform an analysis b ased on the algebraic method for SU (2) and SU (3) chiral symmetry, an d find that baryon axial charges play an essential role fur vanishing coupling constants.