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

• Type: Article in International Scientific Journal
• Date: 2006

Authors

A. Silva (Author) FEUP; Kim, HC (Author) Other; Diana Urbano (Author) FEUP; Goeke, K (Author) Other

Journal

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

Vol. 74

ISSN: 1550-7998

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 23 Citations

Scopus - 25 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8