Document Type
Article
Department/Program
Physics
Journal Title
Physical Review D
Pub Date
2013
Volume
88
Issue
1
Abstract
The gamma Z-box diagram for parity violating elastic e-p scattering has recently undergone a thorough analysis by several research groups. Though all now agree on the analytic form of the diagram, the numerical results differ due to the treatment of the structure functions, F-1,2,3(gamma Z) (x, Q(2)). Currently, F-1,2,3(gamma Z)(x, Q(2)) at low Q(2) and W-2 must be approximated through the modification of existing fits to electromagnetic structure function data. We motivate and describe the modification used to obtain F-1,2(gamma Z)(x, Q(2)) in our previous work. We also describe an alternative modification and compare the result to our original calculation. Finally, we present a new modification procedure to acquire F-3(gamma Z) (x, Q(2)) in the resonance region and calculate the axial contribution to the gamma Z-box diagram. Details of these modifications will illuminate where discrepancies between the groups arise and where future improvements can be made.
Recommended Citation
Rislow, Benjamin C. and Carlson, Carl E., Modification of electromagnetic structure functions for the gamma Z-box diagram (2013). Physical Review D, 88(1).
10.1103/PhysRevD.88.013018
DOI
10.1103/PhysRevD.88.013018
