Search for a New Heavy Gauge Boson Wprime with Electron + missing ET Event Signature in ppbar collisions at sqrt(s)=1.96 TeV

TL;DR

This paper reports a search for a hypothetical heavy W' boson decaying into an electron and neutrino in proton-antiproton collisions at 1.96 TeV, setting mass exclusion limits based on collected data.

Contribution

The study provides the first exclusion limits for W' boson mass below 1.12 TeV/c^2 using electron + missing energy signature at Tevatron energies.

Findings

No significant excess observed over the standard model.

Excluded W' boson masses below 1.12 TeV/c^2 at 95% CL.

Set upper limits on production cross section times branching ratio.

Abstract

We present a search for a new heavy charged vector boson $W^\prime$ decaying to an electron-neutrino pair in $p\bar{p}$ collisions at a center-of-mass energy of $1.96\unit{TeV}$. The data were collected with the CDF II detector and correspond to an integrated luminosity of $5.3\unit{fb}^{-1}$. No significant excess above the standard model expectation is observed and we set upper limits on $\sigma\cdot{\cal B}(W^\prime\to e\nu)$. Assuming standard model couplings to fermions and the neutrino from the $W^\prime$ boson decay to be light, we exclude a $W^\prime$ boson with mass less than $1.12\unit{TeV/}c^2$ at the $95\unit{%}$ confidence level.