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Titolo:
DELTA-I=1 AXIAL-VECTOR MIXING AND CHARGE-SYMMETRY BREAKING
Autore:
COON SA; MCKELLAR BHJ; STOKS VGJ;
Indirizzi:
TRIUMF,4004 WESBROOK MALL VANCOUVER BC V6T 2A3 CANADA UNIV MELBOURNE,SCH PHYS,HIGH ENERGY PHYS RES CTR PARKVILLE VIC 3052 AUSTRALIA NEW MEXICO STATE UNIV,DEPT PHYS LAS CRUCES NM 88003
Titolo Testata:
Physics letters. Section B
fascicolo: 1-4, volume: 385, anno: 1996,
pagine: 25 - 32
SICI:
0370-2693(1996)385:1-4<25:DAMACB>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHIRAL PERTURBATION-THEORY; NUCLEAR-FORCES; MESON; ASYMMETRY; LAGRANGIANS; MODEL; DECAY; QCD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
56
Recensione:
Indirizzi per estratti:
Citazione:
S.A. Coon et al., "DELTA-I=1 AXIAL-VECTOR MIXING AND CHARGE-SYMMETRY BREAKING", Physics letters. Section B, 385(1-4), 1996, pp. 25-32

Abstract

Phenomenological Lagrangians that exhibit (broken) chiral symmetry aswell as isospin violation suggest short-range charge symmetry breaking (CSB) nucleon-nucleon potentials with a sigma(1) .sigma(2) structure. This structure could be realized by the mixing of axial-vector (1(+)) mesons in a single-meson exchange picture. The Coleman-Glashow scheme for Delta I-z = 1 charge symmetry breaking applied to meson and baryon SU(2) mass splittings suggests a universal scale. This scale can beextended to Delta I = 1 nonstrange CSB transitions [a(1) degrees\H-em\f(1)] of size -0.005 GeV2. The resulting nucleon-nucleon axial-vectormeson exchange CSB potential then predicts Delta I = 1 effects which are small.

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Documento generato il 24/09/20 alle ore 05:24:50