Observation of parity nonconservation in møller scattering.
We report a measurement of the parity-violating asymmetry in fixed target electron-electron (Møller) scattering: A(PV)=[-175+/-30(stat)+/-20(syst)] x 10(-9). This first direct observation of parity nonconservation in Møller scattering leads to a measurement of the electron's weak charge at low energy Q(e)(W)=-0.053+/-0.011. This is consistent with the standard model expectation at the current level of precision: sin((2)theta(W)(M(Z))((-)MS)=0.2293+/-0.0024(stat)+/-0.0016(syst)+/-0.0006(theory).
Anthony
P L
PL
Stanford Linear Accelerator Center, Menlo Park, CA 94025, USA.
Arnold
R G
RG
Arroyo
C
C
Baird
K
K
Bega
K
K
Biesiada
J
J
Bosted
P E
PE
Breuer
M
M
Carr
R
R
Cates
G D
GD
Chen
J-P
JP
Chudakov
E
E
Cooke
M
M
Decker
F J
FJ
Decowski
P
P
Deur
A
A
Emam
W
W
Erickson
R
R
Fieguth
T
T
Field
C
C
Gao
J
J
Gustafsson
K
K
Hicks
R S
RS
Holmes
R
R
Hughes
E W
EW
Humensky
T B
TB
Jones
G M
GM
Kaufman
L J
LJ
Kolomensky
Yu G
YG
Kumar
K S
KS
Lhuillier
D
D
Lombard-Nelsen
R
R
Mastromarino
P
P
Mayer
B
B
McKeown
R D
RD
Michaels
R
R
Olson
M
M
Paschke
K D
KD
Peterson
G A
GA
Pitthan
R
R
Pope
K
K
Relyea
D
D
Rock
S E
SE
Saxton
O
O
Shapiro
G
G
Singh
J
J
Souder
P A
PA
Szalata
Z M
ZM
Tobias
W A
WA
Tonguc
B T
BT
Turner
J
J
Tweedie
B
B
Vacheret
A
A
Walz
D
D
Weber
T
T
Weisend
J
J
Whittum
D
D
Woods
M
M
Younus
I
I