6533b85efe1ef96bd12bf2fc
RESEARCH PRODUCT
sigma meson in a nuclear medium through two pion photoproduction
Luis RocaM. J. Vicente VacasE. Osetsubject
PhysicsNuclear and High Energy PhysicsParticle physicsMesonIsoscalarScalar (mathematics)Nuclear TheoryFísicaAmplitudePionInvariant massNucleonNuclear ExperimentNuclear densitydescription
We show theoretical results for $(\gamma, \pi^0 \pi^0)$ 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 two pion 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 |
|---|---|---|---|---|
| 2003-06-01 |