'Leading jets' diaporamas de présentation

7 TeV data First look with data driven method. Process Selection - ak5 calo jets - HLT bits: HLT_Jet15U - JEC: L2+L3 “spring10” - |PVz| < 15 cm && Pvndof >= 4 - |eta1| < 1.3 && |eta2| < 1.3 - 2 leading jets passing the loose jet id - Jet Pt > 20 GeV/c. 1.

7 TeV data with data driven method variable bin sizes. Process Selection - ak5 calo jets - Trigger 0 AND (36 OR 37 OR 38 OR 39) - Scraping veto - Primary vertex: >= 4 DOF , |z| < 15 cm , |d0| < 2 cm - HLT bits: HLT_Jet15U - JEC: L2+L3 “spring10”

Fitting for a Z VBF signal Christian Gutschow , Kiran Joshi, Emily Nurse, Andy Pilkington SM EWK meeting, 10 th August 2012.  Select Z + 2 jet events  Make VBF like cuts  Fit to one discriminating variable for the number of signal and background events.

Pseudo-data. Dijet Mass. Motivation. Likelihood. Systematic Uncertainties. Signal. Data Compared to Fit. Results. Plans to Search for New Particles Decaying to Dijets. Sertac Ozturk 1,2 , Robert M. Harris 2 , Konstantinos Kousouris 2 , Chiyoung Jeong 3 , Sung-Won Lee 3.

7 TeV data with data driven method. Process Selection - ak5 calo jets - Trigger 0 AND (36 OR 37 OR 38 OR 39) - Scraping veto - Primary vertex: >= 4 DOF , |z| < 15 cm , |d0| < 2 cm - HLT bits: HLT_Jet15U - JEC: L2+L3 “spring10” - |eta1| < 1.3 && |eta2| < 1.3

ttbar Cross-Section Studies. D. Jana * , M. Saleem * , F. Rizatdinova ** , P. Gutierrez * , P. Skubic * * University of Oklahoma, ** Oklahoma State University. Motivation (1).

Questions!. W+jets/Wbb+jets background in ttbar measurement (muon+jets). Brad Abbott, Guangshun Huang, Pat Skubic OU ATLAS Group

Dijet DF and Parton-Shower Matching. Marek Zieli ński University of Rochester In collaboration with: Michael Begel, Pavel Demine, Alexander Kupčo, Christophe Royon, Markus Wobisch. What is DF ? Why is DF of interest?. DF is the azimuthal opening angle between the two leading jets