Measurement of the W-gamma and Z-gamma Cross Sections and Limits on Anomalous Triple Gauge Couplings at sqrt-s = 7 TeV

Measurements are presented of $W\gamma$ and $Z\gamma$ cross sections in proton-proton collisions at $\sqrt{s} = 7$~TeV that are used to extract upper limits on anomalous triple gauge couplings. Results are based on data recorded by the CMS experiment at the LHC corresponding to an integrated luminosity of 5 fb$^{-1}$. The cross sections are measured for photon transverse momenta $p_T^\gamma>15$~GeV in the $\ell\nu\gamma$ and $\ell\ell\gamma$ final states, where $\ell$ refers either to an electron or a muon. Limits set on anomalous trilinear $WW\gamma$, $ZZ\gamma$, and $Z\gamma\gamma$ gauge couplings are the most stringent obtained to date.