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Global analysis of parity-violating asymmetry data for elastic electron scattering

 

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Opened Access Global analysis of parity-violating asymmetry data for elastic electron scattering
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Author: González Jiménez, Raúl
Caballero Carretero, Juan Antonio
Donnelly, T. W.
Department: Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Date: 2014-08-01
Published in: Physical Review D - Particles, Fields, Gravitation and Cosmology, 90 (3), 033002-1-033002-5.
Document type: Article
Abstract: We perform a statistical analysis of the full set of parity-violating asymmetry data for elastic electron scattering including the most recent high precision measurement from Q-weak. Given the basis of the present analysis, our estimates appear to favor nonzero vector strangeness, specifically, positive (negative) values for the electric (magnetic) strange form factors. We also provide an accurate estimate of the axial-vector nucleon form factor at zero momentum transfer, GepA(0). Our study shows GepA(0) to be importantly reduced with respect to the currently accepted value. We also find our analysis of data to be compatible with the Standard Model values for the weak charges of the proton and neutron.
Cite: González Jiménez, R., Caballero Carretero, J.A. y Donnelly, T.W. (2014). Global analysis of parity-violating asymmetry data for elastic electron scattering. Physical Review D - Particles, Fields, Gravitation and Cosmology, 90 (3), 033002-1-033002-5.
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URI: http://hdl.handle.net/11441/62585

DOI: 10.1103/PhysRevD.90.033002

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