Measurement of associated WGAMMA production and search for anomalous WWGAMMA couplings with the CMS detector

The Large Hadron Collider (LHC) has recently delivered collisions at a center of mass energyof 7 TeV and has therefore allowed for the first time to test the validity of the Standard Model(SM) at TeV scale. The precise measurement of electroweak processes constitute a central partof this program. Diboson processes, in which pairs of electroweak bosons are produced, providein particular a good opportunity to test SM at these energies. They also allow to seek indirectlyfor new physics through the search for anomalous triple gauge couplings. This thesis presentsa measurement of the inclusive cross section of the pp → W γ → µνγ process for phase spacesET > 15/60/90 GeV and ∆R(µ , γ ) > 0.7 using 5.0 fb−1 of data collected with the CMS detector inγAcknowledgements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1