Dispersion corrections to parity violating electron scattering

Autor:	Gorchtein, M., Horowitz, C. J., Ramsey-Musolf, M. J.
Rok vydání:	2010
Předmět:	High Energy Physics - Phenomenology Nuclear Experiment Nuclear Theory
Druh dokumentu:	Working Paper
DOI:	10.1063/1.3480196
Popis:	We consider the dispersion correction to elastic parity violating electron-proton scattering due to \gammaZ exchange. In a recent publication, this correction was reported to be substantially larger than the previous estimates. In this paper, we study the dispersion correction in greater detail. We confirm the size of the disperion correction to be 6% for the QWEAK experiment designed to measure the proton weak charge. We enumerate parameters that have to be constrained to better than relative 30% in order to keep the theoretical uncertainty for QWEAK under control. Comment: 6 pages, 3 figures, 2 tables; To be published in the proceedings of the VIII Latin American Symposium on Nuclear Physics and Applications, December 15-19, 2009, Santiago, Chiile
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1003.4300 Zobrazit plný text záznamu View this record from Arxiv