Search for Resonances in the Dimuon Mass Distribution in pp Collisions at $\sqrt{s} = 7$ TeV

The CMS Collaboration has performed a search for a narrow resonance in the $\mu^+\mu^-$ channel. The data correspond to an integrated luminosity of 40 pb$^{-1}$ from pp collisions at $\sqrt{s} = 7$~TeV provided by the CERN LHC. Such resonances can arise from new heavy gauge bosons, $Z^\prime$, or Randall-Sundrum Kaluza-Klein gravitons, $G_{KK}$. We present upper limits on the ratio of cross sections times branching fractions $\sigma\left({\rm pp} \rightarrow Z^\prime/G_{\rm KK} + X \rightarrow \mu^+\mu^- + X\right)/\sigma\left({\rm pp} \rightarrow Z^0 + X \rightarrow \mu^+\mu^- + X\right)$.