Under the assumption that the dijet excess seen by the CDF Collaboration near 150 GeV in $Wjj$ production is due to the lightest technipion of the low-scale technicolor (LSTC) process ${\mathrm{<ruby><rb>\rho </rb><rt>ろー</rt></ruby>}}_T\to W{\mathrm{<ruby><rb>\pi </rb><rt>ぱい</rt></ruby>}}_T$, we study its observability in LHC detectors for $\sqrt{s}=8\mathrm{TeV}$ and $\int \mathcal{L}dt=20{\mathrm{fb}}^{-1}$. We describe interesting new kinematic tests that can provide independent confirmation of this LSTC hypothesis. We show that cuts similar to those employed by CDF, and recently by ATLAS, cannot confirm the dijet signal. We propose cuts tailored to the LSTC hypothesis and its backgrounds at the LHC that may reveal ${\mathrm{<ruby><rb>\rho </rb><rt>ろー</rt></ruby>}}_T\to \ell \mathrm{<ruby><rb>\nu </rb><rt>にゅー</rt></ruby>}jj$. Observation of the isospin-related channel ${\mathrm{<ruby><rb>\rho </rb><rt>ろー</rt></ruby>}}_T^{\pm }\to Z{\mathrm{<ruby><rb>\pi </rb><rt>ぱい</rt></ruby>}}_T^{\pm }\to {\ell }^{+}{\ell }^{-}jj$ and of ${\mathrm{<ruby><rb>\rho </rb><rt>ろー</rt></ruby>}}_T^{\pm }\to WZ$ in the ${\ell }^{+}{\ell }^{-}{\ell }^{\pm }{\mathrm{<ruby><rb>\nu </rb><rt>にゅー</rt></ruby>}}_{\ell }$ and ${\ell }^{+}{\ell }^{-}jj$ modes will be important confirmations of the LSTC interpretation of the CDF signal. The $Z{\mathrm{<ruby><rb>\pi </rb><rt>ぱい</rt></ruby>}}_T$ channel is experimentally cleaner than $W{\mathrm{<ruby><rb>\pi </rb><rt>ぱい</rt></ruby>}}_T$ and its rate is known from $W{\mathrm{<ruby><rb>\pi </rb><rt>ぱい</rt></ruby>}}_T$ by phase space. It can be discovered or excluded with the collider data expected by the end of 2012. The $WZ\to 3\ell \mathrm{<ruby><rb>\nu </rb><rt>にゅー</rt></ruby>}$ channel is cleanest of all and its rate is determined from $W{\mathrm{<ruby><rb>\pi </rb><rt>ぱい</rt></ruby>}}_T$ and the LSTC parameter $\sin \mathrm{<ruby><rb>\chi </rb><rt>かい</rt></ruby>}$. This channel and $WZ\to {\ell }^{+}{\ell }^{-}jj$ are discussed as a function of $\sin \mathrm{<ruby><rb>\chi </rb><rt>かい</rt></ruby>}$.

• Received 22 June 2012

DOI:https://doi.org/10.1103/PhysRevD.86.074015