Search for Resonant $WW$ and $WZ$ Production in $p\overline{p}$ Collisions at $\sqrt{s}=1.96\mathrm{TeV}$

We search for resonant $WW$ or $WZ$ production by using up to $5.4{\mathrm{fb}}^{-1}$ of integrated luminosity collected by the D0 experiment in run II of the Fermilab Tevatron Collider. The data are consistent with the standard model background expectation, and we set limits on a resonance mass by using the sequential standard model $W^{\prime }$ boson and the Randall-Sundrum model graviton $G$ as benchmarks. We exclude a sequential standard model $W^{\prime }$ boson in the mass range $180–690\mathrm{GeV}$ and a Randall-Sundrum graviton in the range $300–754\mathrm{GeV}$ at 95% C.L.

Figure 1

The fraction of $W^{\prime }\to WZ$ events with one reconstructed jet (triangles), events with a reconstructed jet mass ($m_j$) greater than 60 GeV (circles), and events with a dijet mass between 60 and 105 GeV (squares) as a function of the $W^{\prime }$ boson mass.

Figure 2

The reconstructed $WW$ or $WZ$ transverse mass distribution for the data (points) with statistical error bars and the estimated backgrounds in the single lepton channel. The predicted SSM $W^{\prime }$ distribution for $M(W^{\prime })=600\mathrm{GeV}$ and the RS graviton distribution for $M(G)=600\mathrm{GeV}$ are shown as solid and dashed lines, respectively.

Figure 3

The reconstructed $WZ$ mass distribution for the data (points) with statistical error bars and the estimated backgrounds, and the predicted SSM $W^{\prime }$ distribution for $M(W^{\prime })=600\mathrm{GeV}$ in the dilepton channel.

Figure 4

The excluded production cross section for an SSM $W^{\prime }$ boson and the RS graviton as a function of the $W^{\prime }$ boson mass or graviton mass. The excluded mass region is the region where the SSM $W^{\prime }$ boson or RS graviton cross section exceeds the excluded cross section.