6533b7d5fe1ef96bd126475b
RESEARCH PRODUCT
On relativistic approaches to pion self-energy in nuclear matter
L. B. LeinsonArmando Pérezsubject
PhysicsNuclear and High Energy PhysicsParticle physicsNuclear TheoryScatteringAstrophysics::High Energy Astrophysical PhenomenaNuclear TheoryFOS: Physical sciencesNuclear matterPartícules (Física nuclear)Scattering amplitudeNuclear Theory (nucl-th)PionSelf-energyIsospinNuclear Experimentdescription
We argue that, in contrast to the non-relativistic approach, a relativistic evaluation of the nucleon--hole and delta-isobar--nucleon hole contributions to the pion self-energy incorporates the s-wave scattering, which requires a more accurate evaluation. Therefore relativistic approach containing only these diagrams does not describe appropriately the pion self-energy in isospin symmetric nuclear matter. We conclude that, a correct relativistic approach to the pion self-energy should involve a more sophisticated calculation in order to satisfy the known experimental results on the near-threshold behaviour of the pion-nucleon (forward) scattering amplitude.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-11-30 |