Measurements of Inclusive W and Z Cross Sections in pp Collisions at sqrt(s)=7 TeV.
Authors (1 total): J. Rohlf
Measurements of inclusive W and Z boson production cross sections in pp collisions at Ös = 7s=7 TeV are presented, based on 2.9 pb−1 of data recorded by the CMS detector at the LHC. The measurements, performed in the electron and muon decay channels, are combined to give s( \textpp ® \textWX ) ×B( \textW ® ln ) = 9.95±0.07( \textstat. )±0.28( \textsyst. )±1.09 ppWXW=995007stat028syst109 (lumi.) nb and s( \textpp ® \textZX ) ×B( Z ® l+ l- ) = 0.931±0.026( \textstat. )±0.023( \textsyst. )±0.102 ppZXZ+−=09310026stat0023syst0102 (lumi.) nb, where ℓ stands for either e or μ. Theoretical predictions, calculated at the next-to-next-to-leading order in QCD using recent parton distribution functions, are in agreement with the measured cross sections. Ratios of cross sections, which incur an experimental systematic uncertainty of less than 4%, are also reported.