Consiglio Nazionale delle Ricerche

Tipo di prodottoArticolo in rivista
TitoloUniversality of nucleon-nucleon short-range correlations: The factorization property of the nuclear wave function, the relative and center-of-mass momentum distributions, and the nuclear contacts
Anno di pubblicazione2016
FormatoCartaceo
Autore/iM. Alvioli (1), C. Ciofi degli Atti (2), H. Morita (3)
Affiliazioni autori(1) CNR-IRPI, Istituto di Ricerca per la Protezione Idrogeologica, Via Madonna Alta 126, I-06128, Perugia, Italy (2) Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Department of Physics, University of Perugia, Via A. Pascoli, I-06123, Italy (3) Sapporo Gakuin University, Bunkyo-dai 11, Ebetsu 069-8555, Hokkaido, Japan
Autori CNR e affiliazioni
  • MASSIMILANO ALVIOLI
Lingua/e
  • inglese
AbstractBackground: The two-nucleon momentum distributions of nucleons N1 and N2 in a nucleus A, nN1N2A(krel,Kc.m.), is a relevant quantity that determines the probability of finding two nucleons with relative momentum krel and center-of-mass (c.m.) momentum Kc.m.; at high values of the relative momentum and, at the same time, low values of the c.m. momentum, nN1N2A(krel,Kc.m.) provides information on the short-range structure of nuclei. Purpose: Our purpose is to calculate the momentum distributions of proton-neutron and proton-proton pairs in He3, He4, C12, O16, and Ca40, in correspondence to various values of krel and Kc.m.. Methods: The momentum distributions for A>4 nuclei are calculated as a function of the relative, krel, and center-of-mass, Kc.m., momenta and relative angle ?, within a linked cluster many-body expansion approach, based upon realistic local two-nucleon interaction of the Argonne family and variational wave functions featuring central, tensor, and spin-isospin correlations. Results: Independently of the mass number A, at values of the relative momentum krel?1.5-2 fm-1 the momentum distributions exhibit the property of factorization, nN1N2A(krel,Kc.m.)?nN1N2rel(krel)nN1N2c.m.(Kc.m.); in particular, for pn back-to-back pairs one has npnA(krel,Kc.m.=0)?CpnAnD(krel)npnc.m.(Kc.m.=0), where nD is the deuteron momentum distribution, npnc.m.(Kc.m.=0) the c.m. motion momentum distribution of the pair, and CpnA the pn nuclear contact measuring the number of back-to-back pn pairs with deuteron-like momenta (kp?-kn,Kc.m.=0). Conclusions: The values of the pn nuclear contact are extracted from the general properties of the two-nucleon momentum distributions corresponding to Kc.m.=0. The Kc.m.-integrated pn momentum distributions exhibit the property npnA(krel)?CpnAnD(krel) but only at very high values of krel, ?3.5-4 fm-1. The theoretical ratio of the pp/pn momentum distributions of He4 and C12 and the calculated c.m. motion momentum distributions are in agreement with recent experimental data.
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Altro abstract-
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Pagine da1
Pagine a9
Pagine totali9
RivistaPhysical review. C. Nuclear physics (Print)
Attiva dal 1970
Editore: Published for the American Physical Society by the American Institute of Physics, - New York, N.Y.
Paese di pubblicazione: Stati Uniti d'America
Lingua: inglese
ISSN: 0556-2813
Titolo chiave: Physical review. C. Nuclear physics (Print)
Titolo proprio: Physical review. (Print)
Titolo abbreviato: Phys. rev. C. Nucl. phys. (Print)
Titolo alternativo: Nuclear physics (Print)
Numero volume della rivista94
Fascicolo della rivista4
DOI10.1103/PhysRevC.94.044309
Verificato da refereeSì: Internazionale
Stato della pubblicazionePublished version
Indicizzazione (in banche dati controllate)
  • Scopus (Codice:2-s2.0-84991696033)
  • ISI Web of Science (WOS) (Codice:000385629600001)
Parole chiavenucleon-nucleon correlations, short-range correlations, realistic wave functions, non-relativistic wave functions
Link (URL, URI)http://journals.aps.org/prc/abstract/10.1103/PhysRevC.94.044309
Titolo parallelo-
Licenza-
Scadenza embargo-
Data di accettazione01/09/2016
Note/Altre informazioni-
Strutture CNR
  • IRPI — Istituto di ricerca per la protezione idrogeologica
Moduli/Attività/Sottoprogetti CNR-
Progetti Europei-
Allegati
Universality of nucleon-nucleon short-range correlations: The factorization property of the nuclear wave function, ... (documento privato )
Tipo documento: application/octet

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Citazione bibliograficaPhysical Review C (Vol.94, No.4)