S wave pi pi correlations in dense nuclear matter
Jun, 1994
35 pages
Published in:
- Nucl.Phys.A 581 (1995) 471-492
e-Print:
- nucl-th/9406010 [nucl-th]
Report number:
- KFA-IKP-TH-1994-21
Citations per year
Abstract:
The s-wave correlated - strength distribution in cold nuclear matter is investigated. The in-medium single pions are renormalized by means of the usual p-wave couplings to nucleons and 's. Two groups of models for the - interaction are studied. The first one uses phenomenological models which reproduce the phase shifts but do not respect the soft-pion theorems. With increasing density a strong accumulation of strength in the subhreshold region is observed. Slightly above saturation density there even occurs an instability with respect to s-wave - pair condensation. These effects are strongly moderated or disappear altogether if constraints from chiral symmetry are built into the - interaction.- nuclear matter
- pi pi: interaction
- interaction: pi pi
- correlation: two-pion
- partial wave
- PCAC model
- pi: condensation
- sigma model: linear
- sigma model: nonlinear
- symmetry: chiral
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