Parity-violating electron deuteron scattering and the proton's neutral weak axial vector form factor.
We report on a new measurement of the parity-violating asymmetry in quasielastic electron scattering from the deuteron at backward angles at Q2=0.038 (GeV/c)2. This quantity provides a determination of the neutral weak axial vector form factor of the nucleon, which can potentially receive large electroweak corrections. The measured asymmetry A=-3.51+/-0.57 (stat)+/-0.58 (syst) ppm is consistent with theoretical predictions. We also report on updated results of the previous experiment at Q2=0.091 (GeV/c)2, which are also consistent with theoretical predictions.
Ito
T M
TM
W. K. Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA. tito@krl.caltech.edu
Averett
T
T
Barkhuff
D
D
Batigne
G
G
Beck
D H
DH
Beise
E J
EJ
Blake
A
A
Breuer
H
H
Carr
R
R
Clasie
B
B
Covrig
S
S
Danagoulian
A
A
Dodson
G
G
Dow
K
K
Dutta
D
D
Farkhondeh
M
M
Filippone
B W
BW
Franklin
W
W
Furget
C
C
Gao
H
H
Gao
J
J
Gustafsson
K
K
Hannelius
L
L
Hasty
R
R
Hawthorne-Allen
A M
AM
Herda
M C
MC
Jones
C E
CE
King
P
P
Korsch
W
W
Kowalski
S
S
Kox
S
S
Kramer
K
K
Lee
P
P
Liu
J
J
Martin
J W
JW
McKeown
R D
RD
Mueller
B
B
Pitt
M L
ML
Plaster
B
B
Quéméner
G
G
Réal
J-S
JS
Ritter
J
J
Roche
J
J
Savu
V
V
Schiavilla
R
R
Seely
J
J
Spayde
D
D
Suleiman
R
R
Taylor
S
S
Tieulent
R
R
Tipton
B
B
Tsentalovich
E
E
Wells
S P
SP
Yang
B
B
Yuan
J
J
Yun
J
J
Zwart
T
T