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Titolo: Chiral 3 piexchange NN potentials: Results for dominant nexttoleadingorder contributions  art. no. 044010
Autore: Kaiser, N;
 Indirizzi:
 Tech Univ Munich, Dept Phys T39, D85747 Garching, Germany Tech Univ Munich Garching Germany D85747 T39, D85747 Garching, Germany
 Titolo Testata:
 PHYSICAL REVIEW C
fascicolo: 4,
volume: 6304,
anno: 2001,
pagine: 4010 
 SICI:
 05562813(200104)6304:4<4010:C3PNPR>2.0.ZU;2B
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 PIONNUCLEON SCATTERING; FORMFACTORS; LAGRANGIANS; EXCHANGE; FORCES; 2PION;
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Physical, Chemical & Earth Sciences
 discip_EC
 Citazioni:
 20
 Recensione:
 Indirizzi per estratti:
 Indirizzo: Kaiser, N Tech Univ Munich, Dept Phys T39, D85747 Garching, Germany Tech Univ Munich Garching Germany D85747 47 Garching, Germany



 Citazione:
 N. Kaiser, "Chiral 3 piexchange NN potentials: Results for dominant nexttoleadingorder contributions  art. no. 044010", PHYS REV C, 6304(4), 2001, pp. 4010
Abstract
We calculate in (twoloop) chiral perturbation theory the local NN potentials generated by the threepion exchange diagrams with one insertion from the second order chiral effective pionnucleon Lagrangian proportional to the lowenergy constants c(1,2,3,.4) The resulting isoscalar central potential vanishes identically. In most cases these 3 pi exchange potentials are larger than the ones generated by the diagrams involving only leading order vertices due to the large values of c(3,4), (which mainly represent virtualDelta excitation). A similar feature has been observed for the chiral 2 piexchange. We also give suitable (doubleintegral) representations for the spinspin and tensor potentials generated by the leadingorder diagrams proportional to g(A)(6) involving four nucleon propagators. In these cases theCutkosky rule cannot be used to calculate the spectral functions in the infinite nucleon mass limit since the corresponding mass spectra start with anonvanishing value at the 3 pi threshold. Altogether, one finds that chiral 3 pi exchange leads to small corrections in the region r greater than or equal to1.4 fm where 1 pi and chiral 2 pi exchange alone provide a very good strong NN force as shown in a recent analysis of the lowenergy ppscattering database.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 13:51:02