6533b826fe1ef96bd1285399
RESEARCH PRODUCT
Electromagnetic structure of the lowest-lying decuplet resonances in covariant chiral perturbation theory
Li-sheng GengJ. Martin CamalichM. J. Vicente Vacassubject
Quantum chromodynamicsPhysicsNuclear and High Energy PhysicsChiral perturbation theoryMagnetic momentNuclear TheoryHigh Energy Physics::LatticeLattice field theoryHigh Energy Physics::PhenomenologyHigh Energy Physics - Lattice (hep-lat)Order (ring theory)FísicaFOS: Physical sciencesLattice QCDNuclear Theory (nucl-th)High Energy Physics - PhenomenologyHigh Energy Physics - LatticeHigh Energy Physics - Phenomenology (hep-ph)Charge radiusQuantum mechanicsQuadrupoledescription
We present a calculation of the leading SU(3)-breaking O(p(3)) corrections to the electromagnetic moments and charge radius of the lowest-lying decuplet resonances in covariant chiral perturbation theory. In particular, the magnetic dipole moment of the members of the decuplet is predicted fixing the only low-energy constant (LEC) present up to this order with the well-measured magnetic dipole moment of the Omega(-). We predict mu(++)(Delta) = 6.04(13) and mu(+)(Delta) = 2.84(2), which agree well with the current experimental information. For the electric quadrupole moment and the charge radius, we use state-of-the-art lattice QCD results to determine the corresponding LECs, whereas for the magnetic octupole moment there is no unknown LEC up to the order considered here, and we obtain a pure prediction. We compare our results with those reported in large N-c, lattice QCD, heavy-baryon chiral perturbation theory, and other models.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-07-03 |