4-8 August 2015
America/Detroit timezone

Search for heavy Majorana neutrinos in same-sign dilepton + jets events in pp collisions at √s = 8 TeV

5 Aug 2015, 15:05
Hussey (Michigan League)


Michigan League

Neutrino Experiment Neutrino Physics


Emrah Tiras (University of Iowa (US))


Several extensions of the Standard Model predict heavy Majorana neutrinos. We consider production of these particles at the LHC and utilize the fact that they are their own antiparticle, so processes that violate lepton number conservation by two units are possible. We report on a search for heavy Majorana neutrinos in the same sign lepton plus jets channel. We look for same sign leptons with at least two jets from the decay of an accompanying W boson. The data correspond to an integrated luminosity of 19.7 fb^-1 of proton-proton collisions at a center-of-mass energy of 8 TeV, collected with the CMS detector at the CERN LHC. No excess of events is observed beyond the expected standard model background and upper limits are set on the mixing element of the heavy Majorana neutrino with the standard model neutrinos, as a function of Majorana neutrino mass for masses in the range of 40–500 GeV.
Oral or Poster Presentation Oral

Primary author

Emrah Tiras (University of Iowa (US))

Presentation Materials