Parity violation in elastic electron-proton scattering and the Proton's strange magnetic form factor
We report a new measurement of the parity-violating asymmetry in elastic electron scattering from the proton at backward scattering angles. This asymmetry is sensitive to the strange magnetic form factor of the proton as well as electroweak axial radiative corrections. The new measurement of A = -4.92+/-0.61+/-0.73 ppm provides a significant constraint on these quantities. The implications for the strange magnetic form factor are discussed in the context of theoretical estimates for the axial corrections.
Spayde
DT
Department of Physics, University of Maryland, College Park, Maryland 20742, USA.
Averett
T
Barkhuff
D
Beck
DH
Beise
EJ
Benson
C
Breuer
H
Carr
R
Covrig
S
DelCorso
J
Dodson
G
Dow
K
Eppstein
C
Farkhondeh
M
Filippone
BW
Frazier
P
Hasty
R
Ito
TM
Jones
CE
Korsch
W
Kowalski
S
Lee
P
Maneva
E
McCarty
K
McKeown
RD
Mikell
J