Chiral expansion, renormalization and the nuclear force
نویسندگان
چکیده
منابع مشابه
Chiral 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 ...
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We study a relation between nuclear forces based on phenomenological approach (Vph) and nuclear effective field theory (VEFT ) from a viewpoint of renormalization group. We find the relation between these two types of nuclear force using Wilsonian renormalization group equation. Considering the fact that VEFT is defined in a certain small model space, we show that a simple contact interaction a...
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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...
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A wide class of models involve the fine–tuning of significant hierarchies between a strong–coupling “compositeness” scale, and a low energy dynamical symmetry breaking scale. We examine the issue of whether such hierarchies are generally endangered by Coleman–Weinberg instabilities. A careful study using perturbative two–loop renormalization group methods finds that consistent large hierarchies...
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Recently we have proposed a new cut–off scheme for pion loop integrals in the two–pion exchange potential. This method allows for a consistent implementation of constraints from pion–nucleon scattering and has been successfully applied to peripheral nucleon–nucleon partial waves. We now consider low partial waves in the non–perturbative regime, where the regularized Lippmann–Schwinger equation ...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 2007
ISSN: 0375-9474
DOI: 10.1016/j.nuclphysa.2007.03.069