mono-z: mc comparison
DESCRIPTION
mono-Z: MC comparison. Tiesheng Dai 1) , Ed. Diehl 1) , Dan Levin 1) , Jianbei Liu 1) ,Shawn McKee 1) , Lailin Xu 1,2) , Bing Zhou 1) , Zhengguo Zhao 2) The Univ. of Michigan The Univ. of Sci. and Tech. of China. 1. 12/14/201211/30/2012. Lailin Xu. MC samples. mono-Z samples: - PowerPoint PPT PresentationTRANSCRIPT
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mono-Z: MC comparison
Tiesheng Dai1), Ed. Diehl1), Dan Levin1), Jianbei Liu1),Shawn McKee1), Lailin Xu1,2), Bing Zhou1) , Zhengguo Zhao2)
1)The Univ. of Michigan2)The Univ. of Sci. and Tech. of China
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MC samples
• mono-Z samples:– mc12_8TeV.158938.MadgraphPythia8_AU2MSTW2008LO_WimpPair_D1_DM1
0.merge.NTUP_SMWZ.e1629_a159_a171_r3549_p1067/– mc12_8TeV.158942.MadgraphPythia8_AU2MSTW2008LO_WimpPair_D5_DM1
0.merge.NTUP_SMWZ.e1629_a159_a171_r3549_p1067/– mc12_8TeV.158951.MadgraphPythia8_AU2MSTW2008LO_WimpPair_ZZxx_DM
50.merge.NTUP_SMWZ.e1629_a159_a171_r3549_p1067/– mc12_8TeV.158946.MadgraphPythia8_AU2MSTW2008LO_WimpPair_D9_DM1
0.merge.NTUP_SMWZ.e1629_a159_a171_r3549_p1067/
• SM ZZ samples– mc12_8TeV.126949.PowhegPythia8_AU2CT10_ZZllnunu_ee_mll4.merge.NTUP_SM
WZ.e1280_s1469_s1470_r3752_r3549_p1067– mc12_8TeV.126950.PowhegPythia8_AU2CT10_ZZllnunu_mm_mll4.merge.NTUP_S
MWZ.e1280_s1469_s1470_r3542_r3549_p1067
Effective Theory of DM
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MC truth event selections
• Select 2l2n events at MC truth level: – mono-Z: qq->Z, Z->ee/mm/tt– SM ZZ: qq->ZZ->ll
• Z mass line shape with following filter:– D1,D5,D9: |mll - mZ| < 37 GeV (Madgraph, ATLFAST II)– D10: zero width approximation (Madgraph, ATLFAST II)– SM ZZ: mll > 4 GeV (Powheg+pythia8)
• Use a preselection for the kinematics comparison– |mll-mZ| < 25 GeV
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Leading lepton pT/Eta
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Dilepton pT/mass
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MET/Aixal-MET
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Jet multiplicity
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Summary
• Kinematics comparison among different DM model operators with the SM ZZ background
• Discussion:– Only ALTFAST (II) simulations, should we produce full
simulation samples ?– Not enougth statisics: D1/D5/D9: 10k; D10: 5K
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