Quartic Gauge Boson Couplings

Abstract

Quartic vertices provide a window into one of the most important problems in particle physics; the understanding of electroweak symmetry breaking. I survey the various processes that have been proposed to study quartic gauge boson couplings at future $e^+e^-$, $e\gamma$, $\gamma\gamma$, $e^-e^-$, and $pp$ colliders. For the lowest dimension operators that do not include photons, it appears that the LHC will provide the most constraining measurements. However, precision measurements at high energy $e^+e^-$ colliders involving $W^+W^-$ rescattering are also quite sensitive to the effects of a strongly interacting weak interaction. For quartic couplings involving photons, $\gamma\gamma$ collisions appear to be the best place to measure these couplings. Measurements using gauge boson production in $e\gamma$ collisions are almost as precise as the $\gamma\gamma$ processes with $e^+e^-\to VVV$ about an order or magnitude less sensitive.