Search for high mass resonances decaying into an electron pair in CMS at $10 TeV$ with $100 pb^{−1}$

The potential of the CMS experiment for the discovery of high mass resonances decaying into an electron pair is presented for a proton-proton centre of mass energy of 10 TeV and an integrated luminosity of 100 pb$^{-1}$. The full strategy is summarized, including electron identification, event selection and efficiency and background determination from the data. The extraction of the expected dielectron mass spectrum is presented. With an integrated luminosity of 100~pb$^{-1}$ CMS has a $5 \sigma$ discovery potential for heavy resonances which exceeds the exclusion limits from the Tevatron or, in the absence of signal, can put limits which improve significantly over the Tevatron limits. This note is an update at 10~TeV of a similar analysis at 14~TeV presented in the CMS PAS EXO-08-001.