1. New Physics at a TeV and the LHC – II & III
Higgs and New Physics Searches at the LHC
Sreerup Raychaudhuri
Tata Institute of Fundamental Research, Mumbai, India
IPM String School (ISS 2009), Tehran, Iran
April 17, 2009

2. Significance of the TeV energy scale:
top-down approach :
GUT or stringy unification must have low energy consequences; high scale SUSY will have low energy manifestations, extra dimensions will become accessible at high enough energies
bottom-up approach :
hierarchy problem, neutrino masses, GUT evolution
aesthetic approach :
18 free parameters in the SM
no QCD-EW unification
desert scenarios

3. Capabilities of the LHC
Cannot do a blind search…
All important final states require a trigger

4. LHC has severe limitations….
Huge QCD backgrounds… especially if looking for hadronic final states
Cannot see very soft pT jets/leptons/photons
LHC has severe limitations….

5. Sure shots :
Can determine t quark properties to precision
Can find the Higgs boson of the SM (if it exists)
Can find a SUSY signal if kinematics permits
Can find a resonant new state
Less sure :
Can measure Higgs boson couplings
Can measure SUSY parameters
Can discover exotics, e.g. gravitons, monopoles…

6. How are we so sure?

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16. RG evolution of mSUGRA spectrum11
RG evolution of mSUGRA spectrum

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Present status of MSSM parameter space

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