6533b82dfe1ef96bd12909b2
RESEARCH PRODUCT
The σ meson in a nuclear medium through two pion photoproduction
Luis RocaEulogio OsetM. J. Vicente Vacassubject
PhysicsNuclear and High Energy PhysicsParticle physicsNuclear TheoryMesonIsoscalarNuclear TheoryScalar (mathematics)FOS: Physical sciencesFísicaNuclear matterNuclear Theory (nucl-th)Nuclear physicsPionHigh Energy Physics::ExperimentInvariant massNuclear ExperimentNucleonNuclear densitydescription
We present theoretical results for (gamma,pi0 pi0) and (gamma,pi+- pi0) production on nucleons and nuclei in the kinematical region where the scalar isoscalar pi pi amplitude is influenced by the sigma pole. The final state interaction of the pions modified by the nuclear medium produces a spectacular shift of strength of the pi0 pi0 invariant mass distribution induced by the moving of the sigma pole to lower masses and widths as the nuclear density increases.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-06-24 | Physics Letters B |