baryon spectrum; scalar meson exchange; semirelativistic constituent quark model
Abstract :
[en] We explore the role of a scalar meson exchange interaction between
quarks in a semirelativistic constituent quark model where the quarks
are also subject to a linear confinement. We study how the spectrum
evolves when the strength of the scalar meson exchange increases. Our
results are relevant to the long-standing problem of the relative
position of the first positive-parity (Roper resonance) and the first
orbitally excited states in the baryon spectrum.
Disciplines :
Physics
Author, co-author :
Stassart, Pierre ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Interactions fondamentales en physique et astrophysique
Stancu, Floarea ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Richard, J. M.; Université Joseph Fourier - Grenoble-IN2P3-CNRS > Institut des Sciences Nucléaires > Professeur
Theussl, Lukas; Université Joseph Fourier-IN2P3-CNRS > Institut des Sciences Nucléaires > postdoc
Language :
English
Title :
On the scalar meson exchange in the baryon spectra
Publication date :
2000
Journal title :
Journal of Physics. G, Nuclear and Particle Physics
