Abstract

The electromagnetic charge operator in a two-nucleon system is derived in chiral effective field theory (χEFT) up to order eQ [or next-to-next-to-next-to-next-to-leading order (N4LO)], where Q denotes the low-momentum scale and e is the electric charge. The specific form of the N3LO and N4LO corrections from, respectively, one-pion-exchange and two-pion-exchange depends on the off-the-energy-shell prescriptions adopted for the nonstatic terms in the corresponding potentials. We show that different prescriptions lead to unitarily equivalent potentials and accompanying charge operators. Thus, provided a consistent set is adopted, predictions for physical observables will remain unaffected by the nonuniqueness associated with these off-the-energy-shell effects.

Autore Pugliese

• Girlanda Luca

Tutti gli autori

• S. Pastore , L. Girlanda , R. Schiavilla , M. Viviani.

Titolo volume/Rivista

PHYSICAL REVIEW. C, NUCLEAR PHYSICS

Anno di pubblicazione

2011

ISSN

0556-2813

ISBN

Non Disponibile

Numero di citazioni Wos

32

Ultimo Aggiornamento Citazioni

28/04/2018

Numero di citazioni Scopus

46

Ultimo Aggiornamento Citazioni

28/04/2018

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile