Bosonic Quartic Couplings at LEP2

TL;DR

This paper identifies and tests anomalous quartic vector boson couplings at LEP2, demonstrating how gauge invariance constrains these couplings and showing potential for future collider experiments to significantly improve bounds.

Contribution

It systematically classifies gauge-invariant anomalous quartic couplings and evaluates their experimental bounds and potential improvements at future colliders.

Findings

Bounds on anomalous couplings from LEP2 data

Distribution analysis for coupling enhancement

Future collider at 500 GeV can improve limits by 1000 times

Abstract

We list the set of C and P conserving anomalous quartic vector bosons self-couplings which can be tested at LEP2 through triple vector boson production. We show how this set can be embedded in manifestly SU(2)xU(1) gauge invariant operators exhibiting an SU(2)_c global symmetry. We derive bounds on these various couplings and show the most relevant distributions that can enhance their contribution. We also find that an e+e- collider running at 500 GeV can improve the LEP2 limits by as much as three orders of magnitude.