Parity-violating asymmetries in elastic ep scattering in the chiral quark-soliton model: Comparison with the A4, G0, HAPPEX and SAMPLE experiments

• Tipo: Artigo em Revista Científica Internacional
• Data: 2006

Autores

A. Silva (Autor) FEUP; Kim, HC (Autor) Outra; Diana Urbano (Autor) FEUP; Goeke, K (Autor) Outra

Revista

Título: Physical Review D - Particles, Fields, Gravitation and Cosmology

Vol. 74

ISSN: 1550-7998

Editora: American Physical Society

Indexação

ISI Web of Knowledge - 23 Citações

Scopus - 25 Citações

Outras Informações

ID Authenticus: P-004-HQF

DOI: 10.1103/physrevd.74.054011

Abstract (EN): We investigate parity-violating electroweak asymmetries in the elastic scattering of polarized electrons off protons within the framework of the chiral quark-soliton model (chi QSM). We use as input the former results of the electromagnetic and strange form factors and newly calculated SU(3) axial-vector form factors, all evaluated with the same set of four parameters adjusted several years ago to general mesonic and baryonic properties. Based on this scheme, which yields positive electric and magnetic strange form factors with mu(s)=(0.08-0.13)mu(N), we determine the parity-violating asymmetries of elastic polarized electron-proton scattering. The results are in a good agreement with the data of the A4, HAPPEX, and SAMPLE experiments and reproduce the full Q(2) range of the G0 data. We also predict the parity-violating asymmetries for the backward G0 experiment.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8