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Titolo:
AN EFFECTIVE LAGRANGIAN WITH BROKEN SCALE AND CHIRAL-SYMMETRY APPLIEDTO NUCLEAR-MATTER AND FINITE NUCLEI
Autore:
HEIDE EK; RUDAZ S; ELLIS PJ;
Indirizzi:
UNIV MINNESOTA,SCH PHYS & ASTRON MINNEAPOLIS MN 55455
Titolo Testata:
Nuclear physics. A
fascicolo: 4, volume: 571, anno: 1994,
pagine: 713 - 732
SICI:
0375-9474(1994)571:4<713:AELWBS>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOW-ENERGY THEOREMS; FIELD-THEORY; PARAMETERS; ANOMALIES; MODEL; APPROXIMATION; INSTABILITY; INVARIANCE; GLUEBALL; GLUONIUM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
44
Recensione:
Indirizzi per estratti:
Citazione:
E.K. Heide et al., "AN EFFECTIVE LAGRANGIAN WITH BROKEN SCALE AND CHIRAL-SYMMETRY APPLIEDTO NUCLEAR-MATTER AND FINITE NUCLEI", Nuclear physics. A, 571(4), 1994, pp. 713-732

Abstract

We study nuclear matter and finite nuclei in the mean field approximation with a chiral lagrangian which generalizes the linear pi model and also accounts for the QCD trace anomaly by means of terms which involve the sigma and pi fields as well as the glueball field phi. The scale invariant term which leads to an omega meson mass, after symmetry breaking, is strongly favored to be of the form omega(mu)omega(mu)phi2 by the bulk properties of nuclei; they also rather strongly constrain the other parameters. A reasonable description of the closed shell nuclei oxygen, calcium and lead can be achieved and this can be improved by including a term (omega(mu)omega(mu)2 in the lagrangian. This leadsto a level of agreement with the data that is comparable to that of the nonlinear Walecka model.

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Documento generato il 02/12/20 alle ore 08:17:25