We analyze the potential of the CERN Large Hadron Collider (LHC) to study the structure of quartic vector-boson interactions through the pair production of electroweak gauge bosons via weak boson fusion qq -> qqWW. In order to study these couplings we have performed a partonic level calculation of all processes pp -> jje(+/-)mu(+/-)nu nu and pp -> jje(+/-)mu(-/+)nu nu at the LHC using the exact matrix elements at O(alpha(6)(em)) and O(alpha(4)(em)alpha(2)(s)) as well as a full simulation of the t (t) over bar plus 0 to 2 jets backgrounds. A complete calculation of the scattering amplitudes is necessary not only for a correct description of the process but also to preserve all correlations between the final-state particles which can be used to enhance the signal. Our analyses indicate that the LHC can improve by more than 1 order of magnitude the bounds arising at the present from indirect measurements.
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