Improved convergence of chiral effective field theory for 1S0 of NN scattering

Abstract

It is argued that the fine-tuning due to the unnaturally large, generalized effective range in the 1S0 channel of NN scattering must be incorporated in order for one to obtain satisfactory convergence for chiral effective field theory. Without the proposition of perturbative one-pion exchange, an effective field theory with the spin-0, isospin-1 dibaryon is developed to account for this fine-tuning, and is demonstrated up to O(Q) where the leading irreducible two-pion exchange arises. The approach shown in the paper results in rapid convergence of the 1S0 partial-wave amplitude.

published version

References in corpus (7)

• Short-range nuclear forces in singlet channels
• Renormalization of Singular Potentials and Power Counting
• Subtractive renormalization of the NN scattering amplitude at leading order in chiral effective theory
• Subtractive renormalization of the NN interaction in chiral effective theory up to next-to-next-to-leading order: S waves
• Taking dibaryon fields seriously
• Deconstructing 1S0 nucleon-nucleon scattering
• Chiral potentials, perturbation theory, and the 1S0 channel of NN scattering

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