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arXiv · 1011.2397

Gamma-Z box contributions to parity violating elastic e-p scattering

Benjamin C. Rislow·Carl E. Carlson
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Abstract

Parity-violating (PV) elastic electron-proton scattering measures Q-weak for the proton, $Q_W^p$. To extract $Q_W^p$ from data, all radiative corrections must be well-known. Recently, disagreement on the gamma-Z box contribution to $Q_W^p$ has prompted the need for further analysis of this term. Here, we support one choice of a debated factor, go beyond the previously assumed equality of electromagnetic and gamma-Z structure functions, and find an analytic result for one of the gamma-Z box integrals. Our numerical evaluation of the gamma-Z box is in agreement within errors with previous reports, albeit somewhat larger in central value, and is within the uncertainty requirements of current experiments.

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Benjamin C. Rislow, Carl E. Carlson. 2010-11-15. Gamma-Z box contributions to parity violating elastic e-p scattering. https://doi.org/10.1103/physrevd.83.113007

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