6533b826fe1ef96bd1284951
RESEARCH PRODUCT
Odd-parity light baryon resonances
Daniel GamermannDaniel GamermannCarmen Garcia-recioJuan NievesLorenzo Luis Salcedosubject
PhysicsNuclear and High Energy PhysicsParticle physicsNuclear Theory010308 nuclear & particles physicsNuclear TheoryHigh Energy Physics::PhenomenologyFOS: Physical sciencesParity (physics)Symmetry groupStrangenessLambda01 natural sciencesOmegaBaryonNuclear Theory (nucl-th)symbols.namesakeHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciencessymbols010306 general physicsLagrangianParity bitdescription
We use a consistent SU(6) extension of the meson-baryon chiral Lagrangian within a coupled channel unitary approach in order to calculate the T-matrix for meson-baryon scattering in s-wave. The building blocks of the scheme are the pion and nucleon octets, the rho nonet and the Delta decuplet. We identify poles in this unitary T-matrix and interpret them as resonances. We study here the non exotic sectors with strangeness S=0,-1,-2,-3 and spin J=1/2, 3/2 and 5/2. Many of the poles generated can be associated with known N, Delta, Sigma, Lambda and Xi resonances with negative parity. We show that most of the low-lying three and four star odd parity baryon resonances with spin 1/2 and 3/2 can be related to multiplets of the spin-flavor symmetry group SU(6). This study allows us to predict the spin-parity of the Xi(1620), Xi(1690), Xi(1950), Xi(2250), Omega(2250) and Omega(2380) resonances, which have not been determined experimentally yet.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-04-14 |