Measurement of W^{+}W^{-} production in pp collisions at √s=7 TeV with the ATLAS detector and limits on anomalous WWZ and WWγ couplings

This paper presents a measurement of the
W
þ
W
production cross section in
pp
collisions at
ffiffiffi
s
p
¼
7 TeV
. The leptonic decay channels are analyzed using data corresponding to an integrated
luminosity of
4
:
6fb
1
collected with the ATLAS detector at the Large Hadron Collider. The
W
þ
W
production cross section
ð
pp
!
W
þ
W
þ
X
Þ
is measured to be
51
:
9
2
:
0
ð
stat
Þ
3
:
9
ð
syst
Þ
2
:
0
ð
lumi
Þ
pb
, compatible with the Standard Model prediction of
44
:
7
þ
2
:
1
1
:
9
pb
. A measurement of the
normalized fiducial cross section as a function of the leading lepton transverse momentum is also
presented. The reconstructed transverse momentum distribution of the leading lepton is used to extract
limits on anomalous
WWZ
and
WW
couplings.