TY - JOUR
T1 - Effective kaon mass in dense baryonic matter
T2 - Role of correlations
AU - Waas, T.
AU - Rho, M.
AU - Weise, W.
N1 - Funding Information:
Much recent attention has been focused on the question of how the mass of the light pseudoscalar mesons (pions and kaons) changes in nuclear matter with increasing baryon density. In the case of pions, the answer was obvious for a long time. In symmetric nuclear matter to leading order in the density p = pp ÷ pn the pion mass shift is Arn~ = -4qrbop where bo is the isospin-even ¢rN scattering length. A chiral low-energy theorem as well as zrN data imply that this bo is very small. Effects of nuclear correlations are therefore important. A useful and successful method to treat such correlations is the effective field approach of Ericson and Ericson \[1 \]. The basic l Work supported in part by GSI and BMBF. 2 Permanent address: Service de Physique Th6orique, CEA Saclay, F-91191 Gif-sur-Yette,F rance; supported in part by the Alexander yon Humboldt Foundation.
Funding Information:
One of the authors (M.R.) acknowledges the support of the Humboldt Foundation through its "Forschungspreis" and the generous hospitality of the Institut ftir Theoretische Physik, Technische Universit~it Mtinchen where this work was done. He is grateful for illuminating comments from Gerry Brown and C.-H. Lee.
PY - 1997/5/19
Y1 - 1997/5/19
N2 - We evaluate the effective kaon mass in dense nuclear matter. Pauli blocking and nucleon-nucleon short-range correlations are incorporated. The effects of short-range correlations are shown to be moderate and figure importantly only at densities larger than 2 times normal nuclear density. We discuss the relations between the present results and the results obtained in next-to-next-to-leading order chiral perturbation theory (O(Q3), where Q is the characteristic small energy-momentum scale probed). We also discuss mean-field aspects, with some remarks on the relation between the short-range correlations and the four-Fermi contact terms in the chiral effective Lagrangian.
AB - We evaluate the effective kaon mass in dense nuclear matter. Pauli blocking and nucleon-nucleon short-range correlations are incorporated. The effects of short-range correlations are shown to be moderate and figure importantly only at densities larger than 2 times normal nuclear density. We discuss the relations between the present results and the results obtained in next-to-next-to-leading order chiral perturbation theory (O(Q3), where Q is the characteristic small energy-momentum scale probed). We also discuss mean-field aspects, with some remarks on the relation between the short-range correlations and the four-Fermi contact terms in the chiral effective Lagrangian.
UR - http://www.scopus.com/inward/record.url?scp=0031578207&partnerID=8YFLogxK
U2 - 10.1016/s0375-9474(97)00020-1
DO - 10.1016/s0375-9474(97)00020-1
M3 - Article
AN - SCOPUS:0031578207
SN - 0375-9474
VL - 617
SP - 449
EP - 463
JO - Nuclear Physics, Section A
JF - Nuclear Physics, Section A
IS - 4
ER -