NN scattering [Formula Presented] mixing angle at next-to-next-to-leading order

Published

Journal Article

The [Formula Presented] mixing angle for nucleon-nucleon scattering [Formula Presented] is calculated to next-to-next-to-leading order in an effective field theory with perturbative pions. Without pions, the low energy theory fits the observed [Formula Presented] well for momenta less than ∼50 MeV. Including pions perturbatively significantly improves the agreement with data for momenta up to ∼150 MeV with one less parameter. Furthermore, for these momenta the accuracy of our calculation is similar to an effective field theory calculation in which the pion is treated nonperturbatively. This gives phenomenological support for a perturbative treatment of pions in low energy two-nucleon processes. We explain why it is necessary to perform spin and isospin traces in d dimensions when regulating divergences with dimensional regularization in higher partial wave amplitudes. © 2000 The American Physical Society.

Full Text

Duke Authors

Cited Authors

  • Fleming, S; Mehen, T; Stewart, IW

Published Date

  • January 1, 2000

Published In

Volume / Issue

  • 61 / 4

Start / End Page

  • 9 -

Electronic International Standard Serial Number (EISSN)

  • 1089-490X

International Standard Serial Number (ISSN)

  • 0556-2813

Digital Object Identifier (DOI)

  • 10.1103/PhysRevC.61.044005

Citation Source

  • Scopus