A High Luminosity e+e- Collider in the LHC tunnel to study the Higgs   Boson
  We consider the possibility of a 120x120 GeV e+e- ring collider in the LHC tunnel. A luminosity of 10^34/cm2/s can be obtained with a luminosity life time of a few minutes. A high operation efficiency would require two machines: a low emittance collider storage ring and a separate accelerator injecting electrons and positrons into the storage ring to top up the beams every few minutes. A design inspired from the high luminosity b-factory design and from the LHeC design report is presented. Statistics of over 10^4 HZ events per year per experiment can be contemplated for a Standard Higgs Boson mass of 115-130 GeV. 
Alain Blondel (DPNC University of Geneva, Switzerland), Frank   Zimmermann (CERN-BE, Geneva, Switzerland)
hep-ex