Abstract

We construct a coordinate-space chiral potential, including Δ-isobar intermediate states in its two-pion-exchange component up to order Q^3 (Q denotes generically the low momentum scale). The contact interactions entering at next-to-leading and next-to-next-to-next-to-leading orders (Q^2 and Q^4, respectively) are rearranged by Fierz transformations to yield terms at most quadratic in the relative momentum operator of the two nucleons. The low-energy constants multiplying these contact interactions are fitted to the 2013 Granada database, consisting of 2309 pp and 2982 np data (including, respectively, 148 and 218 normalizations) in the laboratory-energy range 0–300 MeV. For the total 5291 pp and np data in this range, we obtain a χ2/datum of roughly 1.3 for a set of three models characterized by long- and short-range cutoffs, RL and RS, respectively, ranging from (RL,RS)=(1.2,0.8) fm down to (0.8,0.6) fm. The long-range (short-range) cutoff regularizes the one- and two-pion exchange (contact) part of the potential.

Autore Pugliese

• Girlanda Luca

Tutti gli autori

• Piarulli M. , Girlanda L. , Schiavilla R. , Pérez R. Navarro , Amaro J. E. , Arriola E. R.

Titolo volume/Rivista

PHYSICAL REVIEW. C, NUCLEAR PHYSICS

Anno di pubblicazione

2015

ISSN

0556-2813

ISBN

Non Disponibile

Numero di citazioni Wos

46

Ultimo Aggiornamento Citazioni

28/04/2018

Numero di citazioni Scopus

51

Ultimo Aggiornamento Citazioni

28/04/2018

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile