6533b871fe1ef96bd12d1c2f
RESEARCH PRODUCT
Eta-eta' Photoproduction and the axial isoscalar neutral current coupling
J. VidalG.a. Gonzalez-sprinbergJose Bernabeusubject
CouplingPhysicsParticle physicsChiral perturbation theoryPhysics and Astronomy (miscellaneous)Neutral currentIsoscalarElementary particlePrime (order theory)Partícules (Física nuclear)Nuclear physicsGoldstone bosonHigh Energy Physics::ExperimentNucleonNuclear ExperimentPrimakoff effectBosondescription
We show that coherentη andη′ photoproduction by means of the Primakoff Effect on the proton depends on the strange component of the neutral axial current coupling. We construct polarization asymmetries that are sensitive to this coupling through theγ−Z interference. Theη′ is not a Goldstone boson of a spontaneously broken chiral symmetry, but a phenomenological analysis of theη andη′ production through chiral perturbation theory allows to calculate the observables of interest. The polarized proton or polarized photon asymmetries are predicted to be close to 10−4 for −q 2∼0.1−0.5 GeV2.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1995-01-01 |