Evidence of WW and WZ Production with lepton + jets Final States in pp Collisions at √s = 1.96 TeV

Authors

V. M. Abazov, Joint Institute for Nuclear Research, Dubna, Russia
Kenneth A. Bloom, University of Nebraska-LincolnFollow
Gregory R. Snow, University of Nebraska-LincolnFollow
D0 Collaboration

Date of this Version

2009

Comments

Published in Physical Review Letters 102, 161801 (2009). Copyright © 2009 The American Physical Society. Used by permission.

Abstract

We present first evidence for WW + WZ production in lepton + jets final states at a hadron collider. The data correspond to 1.07 fb^-1 of integrated luminosity collected with the D0 detector at the Fermilab Tevatron in pp collisions at √s = 1.96 TeV. The observed cross section for WW + WZ production is 20.2 ± 4.5 pb, consistent with the standard model and more precise than previous measurements in fully leptonic final states. The probability that background fluctuations alone produce this excess is 10^-6, which corresponds to a significance of 4.4 standard deviations.