Search for anomalous quartic WW{\gamma}{\gamma} couplings in dielectron and missing energy final states in ppbar collisions at sqrt(s) = 1.96 TeV

TL;DR

This study searches for anomalous quartic WWγγ couplings in proton-antiproton collisions, finding no excess and setting the most stringent limits to date on these couplings using data from the D0 detector.

Contribution

First to set experimental limits on anomalous WWγγ couplings in ppbar collisions at 1.96 TeV with detailed analysis of final states involving electrons and missing energy.

Findings

No excess of boosted WW events observed.

Established the most stringent limits on a_0^W and a_C^W couplings.

Set upper limits at 95% C.L. for the anomalous couplings.

Abstract

We present a search for anomalous components of the quartic gauge boson coupling WW{\gamma}{\gamma} in events with an electron, a positron and missing transverse energy. The analyzed data correspond to 9.7 fb^-1 of integrated luminosity collected by the D0 detector in ppbar collisions at sqrt(s) = 1.96 TeV. The presence of anomalous quartic gauge couplings would manifest itself as an excess of boosted WW events. No such excess is found in the data, and we set the most stringent limits to date on the anomalous coupling parameters a_0^W and a_C^W. When a form factor with Lambda_cutoff = 0.5 TeV is used, the observed upper limits at 95 % C.L. are |a_0^W/Lambda^2|< 0.0025 GeV^-2 and |a_C^W/Lambda^2| < 0.0092 GeV^-2.