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Weak radius of the proton

Name: Weak radius of the proton
Creator: C.J. Horowitz
Keywords: Nuclear Theory (nucl-th), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Nuclear Theory, Physics, QC1-999, 0103 physical sciences, FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment

descriptionPublicationkeyboard_double_arrow_right Article , Preprint 01 Feb 2019Embargo end date: 01 Jan 2018Publisher:Elsevier BVJournal:Physics Letters B, volume 789, pages 675-678 (issn: 0370-2693,

Authors: C.J. Horowitz;

doi: 10.1016/j.physletb.2018.12.029 , 10.48550/arxiv.1809.06478

arXiv: http://arxiv.org/abs/1809.06478

Weak radius of the proton

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Abstract

The weak charge of the proton determines its coupling to the $Z^0$ boson. The distribution of weak charge is found to be dramatically different from the distribution of electric charge. The proton's weak radius $R_W= 1.545\pm 0.017$ fm is 80\% larger than its charge radius $R_{ch}\approx 0.84$ fm because of a very large pion cloud contribution. This large weak radius can be measured with parity violating electron scattering and may provide insight into the structure of the proton, various radiative corrections, and possible strange quark contributions.

4 pages, 2 figures, Error estimate improved, Phys. Lett. B in press

Related Organizations

DePaul University
United States
Indiana University
United States

Keywords

Nuclear Theory (nucl-th), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Nuclear Theory, Physics, QC1-999, FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment

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