6533b854fe1ef96bd12adf32
RESEARCH PRODUCT
Electromagnetic form factors of spin 1/2 doubly charmed baryons
Astrid N. Hiller BlinZhi-feng SunM. J. Vicente Vacassubject
QuarkParticle physicsChiral perturbation theoryMesonHeavy baryon chiral perturbation theoryHigh Energy Physics::LatticeLattice field theoryNuclear TheoryFOS: Physical sciencesComputer Science::Digital Libraries01 natural sciencesHigh Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)High Energy Physics - LatticeHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciences010306 general physicsNuclear ExperimentPhysicsQuantum chromodynamics010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyHigh Energy Physics - Lattice (hep-lat)Charmed baryonsBaryonHigh Energy Physics - Phenomenologydescription
We study the electromagnetic form factors of the doubly charmed baryons, using covariant chiral perturbation theory within the extended on-mass-shell (EOMS) scheme. Vector-meson contributions are also taken into account. We present results for the baryon magnetic moments, charge and magnetic radii. While some of the chiral Lagrangian parameters could be set to values determined in previous works, the available lattice results for $\Xi_{cc}^+$ and $\Omega_{cc}^+$ only allow for robust constraints on the low-energy constant (LEC) combination, $c_{89}(=-\frac{1}{3}c_8+4c_9)$. The couplings of the doubly charmed baryons to the vector mesons have been estimated assuming the Okubo--Zweig--Iizuka (OZI) rule. We also give the expressions for the form factors of the double beauty baryons considering the masses predicted in the framework of quark models. A comparison of our results with those obtained in heavy baryon chiral perturbation theory (HBChPT) at the same chiral order is made.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-09-24 |