On the scalar meson exchange in the baryon spectra

Authors
Stassart, P Stancu, F Richard, JM Theussl, L
Citation
P. Stassart et al., On the scalar meson exchange in the baryon spectra, J PHYS G-NU, 26(4), 2000, pp. 397-403
Citations number
22
Categorie Soggetti
Physics
Journal title
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
ISSN journal
09543899 → ACNP
Volume
26
Issue
4
Year of publication
2000
Pages
397 - 403
Database
ISI
SICI code
0954-3899(200004)26:4<397:OTSMEI>2.0.ZU;2-Z
Abstract
We explore the role of a scalar meson exchange interaction between quarks i n a semirelativistic constituent quark model where the quarks are also subj ect to a linear confinement. We study how the spectrum evolves when the str ength of the scalar meson exchange increases. Our results are relevant to t he long-standing problem of the relative position of the first positive par ity (Roper resonance) and the first orbitally excited states in the baryon spectrum.