Measurement of the differential Drell-Yan cross section with the CMS detector at the LHC

The precision measurement of the differential Drell-Yan cross section $d\sigma/dM$ and the first measurement of the double differential cross section $d^2\sigma/dMdY$ at $\sqrt{s} = 7$~TeV are presented. A dataset of $4.7$~fb$^{-1}$ of pp collisions collected with the CMS detector at the LHC during the year 2011 was used for these measurements. The $d\sigma/dM$ cross section was measured in the dimuon channel in the invariant mass range $15$~GeV to $1.5$~TeV. A substantially improved precision compared to the previous measurements has been achieved. The $d2\sigma/dMdY$ cross section measurement has been performed in the dimuon invariant mass range from $15$~GeV to $1$~TeV covering the dimuon rapidity range from $-2.5$ to $2.5$. Both measurements were found to be in good agreement with theoretical predictions estimated using the NNLO MSTW2008 PDFs.