Abstract

We construct the most general, relativistically invariant, contact Lagrangian at order Q(2) in the power counting, with Q denoting the low momentum scale. A complete, but nonminimal, set of (contact) interaction terms is identified, which upon nonrelativistic reduction generate two leading independent operator combinations of order Q(0) and seven subleading ones of order Q(2)-a result derived previously in the heavy-baryon formulation of effective field theories (EFTs). We show that Poincare covariance of the theory requires that additional terms with fixed coefficients be included, to describe the two-nucleon potential in reference frames other than the center-of-mass frame. These terms will contribute in systems with mass numberA > 2, and their impact on EFT calculations of binding energies and scattering observables in these systems should be studied.

Autore Pugliese

• Girlanda Luca

Tutti gli autori

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

Titolo volume/Rivista

PHYSICAL REVIEW. C, NUCLEAR PHYSICS

Anno di pubblicazione

2010

ISSN

0556-2813

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

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Numero di citazioni Scopus

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Settori ERC

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Codici ASJC

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