6533b823fe1ef96bd127edcd

RESEARCH PRODUCT

Quark-mass dependence of baryon resonances

Carmen Garcia-recioM.f.m. LutzEvgeni E. KolomeitsevJuan Luis Nieves

subject

PhysicsQuarkNuclear and High Energy PhysicsParticle physicsOctetNuclear TheoryHigh Energy Physics::LatticeNuclear TheoryHigh Energy Physics::PhenomenologyFOS: Physical sciencesFísicaBaryonNuclear Theory (nucl-th)Turn (geometry)Bound stateOrder (group theory)Limit (mathematics)Singlet state

description

We study the quark-mass dependence of J^P = \frac12^- s-wave and J^P = \frac32^- d-wave baryon resonances. Parameter-free results are obtained in terms of the leading order chiral Lagrangian. In the 'heavy' SU(3) limit with m_\pi =m_K \simeq 500 MeV the s-wave resonances turn into bound states forming two octets plus a singlet representations of the SU(3) group. Similarly the d-wave resonances turn into bound states forming an octet and a decuplet in this limit. A contrasted result is obtained in the 'light' SU(3) limit with m_\pi =m_K \simeq 140 MeV for which no resonances exist.

yearjournalcountryeditionlanguage
2004-01-16
10.1016/j.nuclphysa.2005.01.037http://dx.doi.org/10.1016/j.nuclphysa.2005.01.037