22-28 July 2010
Palais des Congrès de Paris
Europe/Paris timezone

W and Z boson production at CMS in pp collisions at sqrt(s)=7 TeV

22 Jul 2010, 10:10
Salle 252B ()

Salle 252B

Parallel Session Talk 02 - The Standard Model and Electroweak Symmetry Breaking 02 - The Standard Model and Electroweak Symmetry Breaking


Prof. Jeremiah Mans (University of Minnesota/CMS)


The production of W and Z bosons has been observed in pp collisions at a center-of-mass energy of 7 TeV using data collected in the CMS experiment. W events were selected containing an isolated, energetic electron or muon. The presence of an energetic neutrino is demonstrated using the distribution of missing transverse energy (MET), which is calculated from calorimetric and tracking information in three ways. Z events were selected containing a pair of isolated, energetic electrons or muons. Data-driven methods are used to estimate reconstruction and triggering efficiencies, and well as the main backgrounds. We present the W and Z signal yields and the extracted cross-sections at sqrt(s)=7 TeV, as well as preliminary distributions of kinematic variables.

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