Speaker
Mr
Gregorio Bernardi
(LPNHE University of Paris (FR))
Description
We study WW and WZ production with l nu q q (l=e,mu) final states using data collected by the D0 detector at the Fermilab Tevatron Collider corresponding to 4.3 fb-1 of integrated luminosity from ppbar collisions at sqrt(s)=1.96 TeV. Assuming the ratio between the production cross sections sigma(WW) and sigma(WZ) as predicted by the standard model, we measure the total WV (V=W,Z) cross section to be sigma(WV)= 19.6^{+3.2}_{-3.0} pb, and reject the background-only hypothesis at a level of 7.9 standard deviations. We also use b-jet discrimination to separate the WZ component from the dominant WW component. Simultaneously fitting WW and WZ contributions, we measure sigma(WW) = 15.9^{+3.7}_{-3.2} pb and sigma(WZ) = 3.3^{+4.1}_{-3.3} pb, which is consistent with the standard model predictions.
Author
Mr
Gregorio Bernardi
(LPNHE University of Paris (FR))
