Testing neutrino masses in LHC
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Transcript of 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.
Triplet Higgs may be needed to generate Majorana mases to left-hand neutrinos.
The neutrino mass matrix:
Phenomenology
Leptons are described by Lagrangian:
Normal hierarchical light neutrino masses imply
Drell-Yan pair production and Higgs decay
Detector hardware
Detector hardware
Transverse slice through CMS detector
Detector is not ready yet
huge number of events
MC generator (Pythia)
Detector simulation (CMSSW)
++ 4 ,jet
plus SM background
tt, ttZ, ZZ 4 ,jet
4 ´, jet´,
ETmiss
Detector is not ready yet – things are simulated
huge number of events
MC level analysis
Data from detector: Npjet , ETmiss
Selection rules
S0 – < 2.4
S1 – 2 + and 2 - muons or jets
S2 – PT
S3 – Z-tagging
S4 – m++ / m–
Monte Carlo results
Monte Carlo results
Thank You