منابع مشابه
Nucleon-Nucleon interactions from effective field theory
We have established a new convergent scheme to treat analytically nucleon-nucleon interactions from a chiral effective field theory. The Kaplan-Savage-Wise (KSW) amplitudes are resummed to fulfill the unitarity or right hand cut to all orders below pion production threshold. This is achieved by matching order by order in the KSW power counting the general expression of a partial wave with resum...
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Nuclear processes involving momenta much below the mass of the pion may be described by an effective field theory in which the pions do not appear as explicit degrees of freedom. The effects of the pion and all other virtual hadrons are reproduced by the coefficients of gauge-invariant local operators involving the nucleon field. Nucleon-nucleon scattering phase shift data constrains many of th...
متن کاملNucleon-Nucleon Scattering from Effective Field Theory
We perform a nonperturbative calculation of the S0 NN scattering amplitude, using an effective field theory (EFT) expansion. We use dimensional regularization throughout, and the MS renormalization scheme; our final result depends only on physical observables. We show that the EFT expansion of the quantity |p| cot δ(p) converges at momenta much greater than the scale Λ that characterizes the de...
متن کاملMeson-nucleon Vertex Corrections to the Vacuum Polarization in the Cutoff Field Theory and Tensor Coupling
At zero-density, meson-nucleon vertex corrections to vacuum polarization are studied in the σ-ω model with the cutoff. It is shown that the properties of the vertex corrections to vacuum polarization are somewhat different from those described by the ordinary renormalization procedures when the cutoff is small ( < 5GeV). The low-energy effective Lagrangian is constructed in the framework of the...
متن کاملComparison of Regularization Methods for Nucleon-nucleon Effective Field Theory
The characteristics of a meaningful effective field theory (EFT) analysis are discussed and compared with traditional approaches to NN scattering. A key feature of an EFT treatment is a systematic expansion in powers of momentum, which is demonstrated using an error analysis introduced by Lepage. A clear graphical determination of the radius of convergence for the momentum expansion is also obt...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1952
ISSN: 0033-068X,1347-4081
DOI: 10.1143/ptp/8.1.133