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Title: γZ corrections to forward-angle parity-violating ep scattering

We use dispersion relations to evaluate the γZ box contribution to parity-violating electron scattering in the forward limit, taking into account constraints from recent JLab data on electroproduction in the resonance region as well as high energy data from HERA. The correction to the asymmetry is found to be 1.2 +- 0.2% at the kinematics of the JLab Qweak experiment, which is well within the limits required to achieve a 4% measurement of the weak charge of the proton.
Authors:
;  [1] ;  [2] ;  [3]
  1. Univ. of Manitoba, Winnipeg, MB (Canada); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  3. Univ. of Adelaide, Adelaide, SA (Australia)
Publication Date:
OSTI Identifier:
985705
Report Number(s):
JLAB-THY--09-1049; DOE/OR/23177--0952
Journal ID: ISSN 1550-7998; PRVDAQ; TRN: US201016%%2099
Grant/Contract Number:
AC05-06OR23177
Type:
Accepted Manuscript
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 82; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society (APS)
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; DISPERSION RELATIONS; ELECTRONS; ELECTROPRODUCTION; RESONANCE; SCATTERING