HOW LARGE IS THE SIGMA-NUCLEON-N-ASTERISK(1440) COUPLING-CONSTANT

Authors
SOYEUR M
Citation
M. Soyeur, HOW LARGE IS THE SIGMA-NUCLEON-N-ASTERISK(1440) COUPLING-CONSTANT, ACT PHY P B, 29(9), 1998, pp. 2501-2507
Citations number
12
Categorie Soggetti
Physics
Journal title
ACTA PHYSICA POLONICA B
ISSN journal
05874254 → ACNP
Volume
29
Issue
9
Year of publication
1998
Pages
2501 - 2507
Database
ISI
SICI code
0587-4254(1998)29:9<2501:HLITSC>2.0.ZU;2-6
Abstract
The experimental information presently available on the sigma-nucleon- N(1440) coupling constant is briefly discussed and the large uncertai nty in this quantity is emphasized. We show that measurements of the a ssociate photoproduction of a vector meson (rho- or omega-meson) and o f the Roper resonance off proton targets near threshold could provide direct information on the strength of the scalar-isoscalar excitation of the N(1440) and hence on the magnitude of the sigma NN*(1440) coup ling.