Physics analysis using ZHH channel Imperial CALICE-UK Meeting 23 January 2007 Michele Faucci Giannelli Mike Green Fabrizio Salvatore

23/01/2007Royal Holloway Group2 Analysis of ZHH We had a first look at all channels then we concentrated on Z → leptons. Good selection for the Z, both for electrons and muons. Check of Calorimeters calibration constants. Higgs reconstruction minimizing Neutrino and invisible particle contribution Comparison between ClusterWise+Wolf and Pandora. Comparison between LDC00Sc and LDC01Sc using Pandora.

23/01/2007Royal Holloway Group3 Difference between wolf and Pandora Black Pandora Red Wolf Blue is MC

23/01/2007Royal Holloway Group4 Comparison Electrons Muons Invisible particle add 6 GeV. Wolf reconstructed mass is too high. PANDORA WOLF

23/01/2007Royal Holloway Group5 el and  in LDC0XSc LDC00Sc LDC01Sc MUONS ELECTRONS PANDORA bremsstrahlung

23/01/2007Royal Holloway Group6 Backgrounds Work has been started on some possible cut to apply. –Vertex –Y cut in jet finder algorithm –Z mass Difficult task, many channels to explore, huge problem from combinatorial. Time problem if we want to simulate background for all models. Fast simulation is not available for all models

23/01/2007Royal Holloway Group7 Future plans Move to 6 jets analysis –Need B tagging, is it ready? –New strategy for Z selection –Different backgrounds –… More analysis for backgrounds –Strategy to address this problem –Some application to ZHH Z/W separation plots, update if any mayor release