Electroweak Physics at ATLAS

Various electroweak measurements have already been performed at ATLAS since the start of the LHC. These allow for precision tests of the electroweak dynamics of the Standard Model, but also challenge next-to-next-to-leading-order predictions. Differences between measurements and SM predictions could prove evidence for new phenomena. A review of the latest results in W/Z and diboson physics will be given. Those consist of the measurement of the high-mass drell-yan differential cross section, the Wb(b) production cross section and the study of the transverse momentum of the Z/$\gamma*$ using the $\phi*$ variable, with 5fb$^{-1}$ of 2011 data. The latest diboson WW, WZ, ZZ, W$\gamma$ and Z$\gamma$ production cross sections will be summarized, including new WW and ZZ results. In particular, the ZZ* channel has been added. The diboson processes are an important source of background to Higgs production decaying into vector boson pairs, such as H$\rightarrow$WW and H$\rightarrow$ZZ, and also to other new physics processes. It is therefore very important to have precise measurements of their production cross sections. The latest ATLAS limits on charge triple gauge couplings (WWZ, WW$\gamma$) are more stringent than the Tevatron experiment ones and approach the LEP combined limits. The ones on neutral triple gauge couplings (Z$\gamma\gamma$, ZZ$\gamma$, ZZZ) are more stringent than the Tevatron and LEP results.