Chiral dynamics in the presence of bound states: kaon-nucleon interactions revisited

被引：798

作者：

Oller, JA ^{[1
]}

Meissner, UG ^{[1
]}

机构：

[1] Forschungszentrum Julich, Inst Kernphy Theorie, D-52425 Julich, Germany

来源：

PHYSICS LETTERS B | 2001年 / 500卷 / 3-4期

关键词：

D O I：

10.1016/S0370-2693(01)00078-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the S-wave kaon-nucleon interactions for strangeness S = -1 in a novel relativistic chiral unitary approach based on coupled channels. Dispersion relations are used to perform the necessary resummation of the lowest order relativistic chiral Lagrangian. A good description of the data in the K(-)p, pi Sigma and pi Lambda channels is obtained. We show how this method can be systematically extended to higher orders, emphasizing its applicability to any scenario of strong self-interactions where the perturbative series diverges even at low energies. Discussions about the differences to existing approaches employing pseudopotentials in a regulated Lippmann-Schwinger equation are included. Finally, we describe the resonance content of our meson-baryon amplitudes and discuss its nature. (C) 2001 Published by Elsevier Science B.V.

引用

页码：263 / 272

页数：10

共 49 条

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[23] Kaon spectrum revisited: bound states of high energy and spin
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