Randall Sundrum Modelparticle.korea.ac.kr/class/2012/phy713/knmin.pdf · 7396 200 0436 .08696 400 '...
Transcript of Randall Sundrum Modelparticle.korea.ac.kr/class/2012/phy713/knmin.pdf · 7396 200 0436 .08696 400 '...
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Randall Sundrum Model
Kyungnam Min
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1. Introduction
5D Einstein Equation and Randall Sundrum Setup
Planck Brane TeV Brane Our world
Assume…
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Warped Factor
2. Calculation
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2. Calculation
Neutrino Oscillation
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3. Hierarchy
Exponential Hierarchy
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4. BR
RS Branching Ratios
The branching ratios of the gluon decay is large…
but SM backgrounds are very large.
Many physicists are searching for the 2-leptons or 2-photons channels.
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5. Decay mode
1. pp > G > l+l-
2. pp > G > ZZ(Z > l+l-, Z>2jets)
Background is… Z > l+l- (500000) ttbar (100000) WW (100000)
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6. Cross section
The cross section of the RS model is small.
If the RS graviton is 1TeV, the cross section is ~ 0.6 fb^{-1}.
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pp > G > l+l-
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Pre-Selection 400,600,800,1000GeV
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Backgrounds
Main background is Z>l+l-.
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Signal and Background
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Lepton PT and MET
•Lepton PT > 150GeV
•MET < 30GeV
The lepton PT of the signal is very energetic.
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Delta Phi
Back to Back !
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Lepton PT >150GeV
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MET < 30GeV
Delta Phi > 2.8
1TeV Signal Event : 24.2
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pp > G > ZZ > l+l-2jets
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Z boson mass and Kkmass(1TeV)
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