Author: Chav Chhiv Chau

Publisher:

Published: 2017

Total Pages:

ISBN-13:

Extension of the Standard model can enhance the interactions between four vector bosons, so the couplings deviate from their predicted value due to new quartic-gauge-boson interactions. Searches for those deviations are model-independent and cover a wide range of possible new physics. This thesis describes the measurement of exclusive production of W-boson pairs and the search for WW\gamma\gamma anomalous quartic gauge couplings at the Large Hadron Collider (LHC) using a data set corresponding to 20.2 fb-1 of proton-proton collisions collected by the ATLAS detector in 2012. This analysis considers the W+W- decay modes leading to e\mu leptons. At the LHC, exclusive interactions are characterized by the absence of additional activity in the vicinity of interaction vertices. A technique based on tracks was developed to select the exclusive event candidates. The technique accepts approximately 60% of the signal, while eliminates most of the background due to suppression by 3--4 orders of magnitude. Additional background reduction is achieved by rejecting the region pT^{e\mu}