6533b7dafe1ef96bd126ebeb

RESEARCH PRODUCT

Unitarity, analyticity and duality constraints in η and π photoproduction

Mikhail Gorchtein

subject

PhysicsParticle physicsUnitarity010308 nuclear & particles physicsPhysicsQC1-999Nuclear TheoryDouble counting (proof technique)Duality (optimization)01 natural sciencesPionDispersion relation0103 physical sciencesIsobarHigh Energy Physics::Experiment010306 general physicsNuclear Experiment

description

We report an update of the isobar model EtaMAID. A new approach is proposed to avoid double counting in the overlap region of Regge and resonances. Dispersion relation is applied on top of the isobar model, and both models describe the data equally well. Application of these ideas to pion photoproduction is discussed.

yearjournalcountryeditionlanguage
2019-01-01EPJ Web of Conferences
10.1051/epjconf/201919902002https://www.epj-conferences.org/articles/epjconf/pdf/2019/04/epjconf_meson2019_02002.pdf