6533b7d2fe1ef96bd125eb48
RESEARCH PRODUCT
In-medium pi-pi Correlation Induced by Partial Restoration of Chiral Symmetry
Daisuke JidoTetsuo HatsudaTeiji Kunihirosubject
Chiral anomalyPhysicsNuclear and High Energy PhysicsChiral symmetryChiral perturbation theoryNuclear TheoryScatteringHigh Energy Physics::PhenomenologyFOS: Physical sciencesNuclear matterNuclear Theory (nucl-th)Formalism (philosophy of mathematics)symbols.namesakeHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Quantum electrodynamicssymbolsChiral symmetry breakingNuclear ExperimentLagrangianMathematical physicsdescription
We show that both the linear and the non-linear chiral models give an enhancement of the pi-pi cross section near the 2pi threshold in the scalar-iso-scalar (I=J=0) channel in nuclear matter. The reduction of the chiral condensate, i.e., the partial chiral restoration in nuclear matter, is responsible for the enhancement in both cases. We extract an effective 4pi-nucleon vertex which is responsible for the enhancement but has not been considered in the non-liear models for in-medium pi-pi interaction. Relation of this vertex and a next-to-leading order terms in the heavy-baryon chiral lagrangian, L_piN^(2), is also discussed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-08-09 |