randall sundrum modelparticle.korea.ac.kr/class/2012/phy713/knmin.pdf · 7396 200 0436 .08696 400...
TRANSCRIPT
Randall Sundrum Model
Kyungnam Min
1. Introduction
5D Einstein Equation and Randall Sundrum Setup
Planck Brane TeV Brane Our world
Assume…
Warped Factor
2. Calculation
2. Calculation
Neutrino Oscillation
3. Hierarchy
Exponential Hierarchy
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.
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)
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}.
pp > G > l+l-
Pre-Selection 400,600,800,1000GeV
Backgrounds
Main background is Z>l+l-.
Signal and Background
Lepton PT and MET
•Lepton PT > 150GeV
•MET < 30GeV
The lepton PT of the signal is very energetic.
Delta Phi
Back to Back !
Lepton PT >150GeV
MET < 30GeV
Delta Phi > 2.8
1TeV Signal Event : 24.2
pp > G > ZZ > l+l-2jets
Z boson mass and Kkmass(1TeV)