منابع مشابه
Effective Field Theory
Attempts to apply effective field theory (EFT) methods to nonrelativistic nucleon-nucleon (N N) scattering have raised questions about the nature and limitations of an EFT expansion when used nonperturbatively. We discuss the characteristics of a meaningful EFT analysis and compare them with traditional approaches to N N scattering. A key feature of an EFT treatment is a systematic expansion in...
متن کاملEffective β-functions for Effective Field Theory
We consider the problem of determining the beta-functions for any reduced effective field theory. Even though not all the Green’s functions of a reduced effective field theory are renormalizable, unlike the full effective field theory, certain effective beta-functions for the reduced set of couplings may be calculated without having to introduce vertices in the Feynman rules for redundant opera...
متن کاملEffective Field Theory Dimensional Regularization
A Lorentz-covariant regularization scheme for effective field theories with an arbitrary number of propagating heavy and light particles is given. This regularization scheme leaves the low-energy analytic structure of Greens functions intact and preserves all the symmetries of the underlying Lagrangian. The power divergences of regularized loop integrals are controlled by the low-energy kinemat...
متن کاملScattering From Effective Field Theory
We examine the role of the ∆∆ intermediate state in NN scattering in the S0 channel. The computation is performed at lowest order in an effective field theory involving local four-fermion operators and one pion exchange using dimensional regularization with MS. As first discussed by Weinberg, in the theory with only nucleons the large scattering length in this channel requires a small scale for...
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ژورنال
عنوان ژورنال: Annual Review of Nuclear and Particle Science
سال: 1993
ISSN: 0163-8998,1545-4134
DOI: 10.1146/annurev.ns.43.120193.001233