Nuclear axial currents in chiral effective field theory

A. Baroni, L. Girlanda, S. Pastore, R. Schiavilla, and M. Viviani
Phys. Rev. C 93, 015501 – Published 11 January 2016; Errata Phys. Rev. C 93, 049902 (2016); Phys. Rev. C 95, 059901 (2017)

Abstract

Two-nucleon axial charge and current operators are derived in chiral effective field theory up to one loop. The derivation is based on time-ordered perturbation theory and accounts for cancellations between the contributions of irreducible diagrams and the contributions owing to nonstatic corrections from energy denominators of reducible diagrams. Ultraviolet divergencies associated with the loop corrections are isolated in dimensional regularization. The resulting axial current is finite and conserved in the chiral limit, while the axial charge requires renormalization. A complete set of contact terms for the axial charge up to the relevant order in the power counting is constructed.

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  • Received 23 September 2015
  • Revised 29 October 2015

DOI:https://doi.org/10.1103/PhysRevC.93.015501

©2016 American Physical Society

Physics Subject Headings (PhySH)

Particles & FieldsNuclear Physics

Errata

Erratum: Nuclear axial currents in chiral effective field theory [Phys. Rev. C 93, 015501 (2016)]

A. Baroni, L. Girlanda, S. Pastore, R. Schiavilla, and M. Viviani
Phys. Rev. C 93, 049902 (2016)

Erratum: Nuclear axial currents in chiral effective field theory [Phys. Rev. C 93, 015501 (2016)]

A. Baroni, L. Girlanda, S. Pastore, R. Schiavilla, and M. Viviani
Phys. Rev. C 95, 059901 (2017)

Authors & Affiliations

A. Baroni1, L. Girlanda2, S. Pastore3,4, R. Schiavilla1,5, and M. Viviani6

  • 1Department of Physics, Old Dominion University, Norfolk, Virginia 23529, USA
  • 2Department of Mathematics and Physics, University of Salento and INFN-Lecce, 73100 Lecce, Italy
  • 3Department of Physics and Astronomy, University of South Carolina, Columbia, South Carolina 29208, USA
  • 4Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
  • 5Theory Center, Jefferson Lab, Newport News, Virginia 23606, USA
  • 6INFN-Pisa, 56127 Pisa, Italy

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Issue

Vol. 93, Iss. 1 — January 2016

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