6533b825fe1ef96bd1281c42
RESEARCH PRODUCT
Δ(1232)resonance in theγ→p→pπ0reaction at threshold
A. N. Hiller BlinT. LedwigM. J. Vicente Vacassubject
PhysicsParticle physicsChiral perturbation theoryProton010308 nuclear & particles physicsHigh Energy Physics::LatticeNuclear TheoryOrder (ring theory)01 natural sciencesResonance (particle physics)BaryonNuclear physicsPion0103 physical sciencesCovariant transformationNuclear Experiment010306 general physicsMicrotrondescription
We calculate the neutral pion photoproduction on the proton near threshold in covariant baryon chiral perturbation theory, including the $\Delta(1232)$ resonance as an explicit degree of freedom, up to chiral order $p^{7/2}$ in the $\delta$ counting. We compare our results with recent low-energy data from the Mainz Microtron for angular distributions and photon asymmetries. The convergence of the chiral series of the covariant approach is found to improve substantially with the inclusion of the $\Delta(1232)$ resonance.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-05-20 | Physical Review D |