منابع مشابه
The Nuclear Central Force in the Chiral Limit
Chiral perturbation theory supplemented by the Omnes function is employed to study the strength of the isoscalar central nuclear interaction, GS , in the chiral limit vs the physical case. A very large modification is seen , i.e. ηs = GS chiral/GS physical = 1.37 ± 0.10. This large effect is seen to arise dominantly at low energy from the extra contributions made by massless pions at energies n...
متن کاملNuclear forces in the chiral limit
We investigate the behaviour of the nuclear forces as a function of the light quark masses (or, equivalently, pion mass) in the framework of chiral effective field theory at next-to-leading order. The nucleon–nucleon force is described in terms of one and two–pion exchange and local short distance operators, which depend explicitly and implicitly on the quark masses. The pion propagator becomes...
متن کاملChiral Limit of Nuclear Physics
We study nuclear physics in the chiral limit (mu, md = 0) in which the pion mass vanishes. We find that the deuteron mass is changed little, but that P–wave nucleon–nucleon scattering volumes are infinite. This motivates an investigation of the possibilities that there could be a two–nucleon 3P0 bound state, and that the nuclear matter ground state is likely to be a condensed state of nucleons ...
متن کاملChiral Expansion, Renormalization and the Nuclear Force
A piece of standard wisdom in nuclear physics has been the long distance dominance of pion exchanges of the nuclear force while the short range component is fairly unknown [ 1]. Such a situation seems a fertile ground for Effective Field Theories [ 2, 3]. Actually, the functional dependence of the long range piece is calculable within chiral perturbation theory [ 4, 5] yielding for the reduced ...
متن کاملFurther comments on nuclear forces in the chiral limit
We substantiate our statement that the deuteron remains bound in the chiral limit. We critically discuss recent claims that effective field theory cannot give a definite answer to this question. email: [email protected] email: [email protected] email: [email protected] 1. The question of the quark mass dependence of the nuclear forces has attract...
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ژورنال
عنوان ژورنال: Physical Review C
سال: 2006
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.74.024002