Underlying Event in Drell-Yan Production

Document(s) Web Page       arXiv:1002.3146       Phys. Rev. D82, 034001 (2010) Contact(s) R. Field, Deepak Kar, C. Group Abstract We study the event topology in Drell-Yan lepton-pair production in proton-antiproton collisions at 1.96 TeV in Run 2 at CDF. We use the direction of the lepton-pair on a event by event basis to define three regions of \eta-\phi space; toward, away and transverse. The "transverse" region is very sensitive to the "underlying event". The data are corrected to the particle level and are then compared with the PYTHIA Tune AW. The properties of the "underlying event" are examined as a function of the lepton-pair transverse momentum. The data are also compared with a previous analysis on the behavior of the "underlying event" in high transverse momentum jet production. The goal is to improve our understanding and modeling of the high energy collider events. Comments Last Update: July 2008       Dataset: 2.3 fb-1