Contributions From yZ Box Diagrams to Parity Violating Elastic e-p Scattering
Parity-violating (PV) elastic electron-proton scattering measures Q-weak for the proton, Q{sub W}{sup p}. To extract Q{sub W}{sup p} from data, all radiative corrections must be well-known. Recently, disagreement on the {gamma}Z box contribution to Q{sub W}{sup 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.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1039297
- Report Number(s):
- JLAB-THY-11-1471; DOE/OR/23177-2082; arXiv:1011.2397; TRN: US1202143
- Journal Information:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 83, Issue 11; ISSN 1550-7998
- Country of Publication:
- United States
- Language:
- English
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