Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-03-22
Phys.Lett. B335 (1994) 266-272
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages and 2 figures(LaTeX), SNUTP-94-28. The fig. 3 is replaced, with some changes in the text but the conclusion is not af
Scientific paper
10.1016/0370-2693(94)90348-4
The critical density for kaon condensation in ``nuclear star" matter is computed up to two-loop order {\it in medium} (corresponding to next-to-next-to-leading order in chiral perturbation theory in free space) with a heavy-baryon effective chiral Lagrangian whose parameters are determined from $KN$ scattering and kaonic atom data. To the order considered, the kaon self-energy has highly non-linear density dependence in dense matter. We find that the four-Fermi interaction terms in the chiral Lagrangian play an important role in triggering condensation, predicting for ``natural" values of the four-Fermi interactions a rather low critical density, $\rho_c < 4 \rho_0$.
Brown Gerald E.
Lee Chang-Hwan
Rho Mannque
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