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Testing neutrino masses in LHC

Testing neutrino masses in LHC. Mait Müntel , Andi Hektor, Mario Kadastik, Liis Rebane, Martti Raidal National Institute of Chemical Physics and Biophysics. Joint seminar on cosmology and astroparticle-physics February 26th and 27th, Tartu Observatory. Phenomenology.

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Testing neutrino masses in LHC

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  1. Testing neutrino masses in LHC Mait Müntel, Andi Hektor, Mario Kadastik, Liis Rebane, Martti Raidal National Institute of Chemical Physics and Biophysics Joint seminar on cosmology and astroparticle-physics February 26th and 27th, Tartu Observatory.

  2. Phenomenology Triplet Higgs F may be needed to generate Majorana mases to left-hand neutrinos. The neutrino mass matrix: Leptons are described by Lagrangian:

  3. Drell-Yan pair production and Higgs decay Normal hierarchical light neutrino masses imply

  4. Detector hardware

  5. Detector hardware

  6. Transverse slice through CMS detector

  7. Detector is not ready yet huge number of events

  8. Detector is not ready yet – things are simulated huge number of events MC generator (Pythia) Detector simulation (CMSSW) F++ 4 m,jet 4 m´, jet´, ETmiss plus SM background tt, ttZ, ZZ 4 m,jet

  9. MC level analysis Data from detector: Npm,jet , ETmiss

  10. Selection rules S0 – h < 2.4 S1 – 2 + and 2 - muons or jets S2 – PT S3 – Z-tagging S4 – m++ / m–

  11. Monte Carlo results

  12. Monte Carlo results

  13. Thank You

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