2014/12/31 by Lucía Duarte, Gabriel A. González-Sprinberg, Oscar Alfredo Sampayo
Physics and Astronomy · #hep-ph
paper · pdf · doi:10.1103/physrevd.91.053007
published as Phys. Rev. D 91, 053007 (2015) · 15 pages, 11 pdf figures. arXiv admin note: text overlap with arXiv:1110.0959
arxiv created 2015/03/24 · arxiv updated 2015/06/23
We investigate the possibility of detecting Majorana neutrinos at the Large Hadron-electron Collider (LHeC), an electron-proton collision mode at CERN. We study the lj+ + 3 jets (lj≡ e ,μ,τ) final states which are, due to leptonic number violation, a clear signature for intermediate Majorana neutrino contributions. Such signals are not possible if the heavy neutrinos have Dirac nature. The interactions between Majorana neutrinos and the Standard Model (SM) particles are obtained from an effective lagrangian approach. We present our results for the total cross section as a function of the neutrino mass, the effective couplings and the new physics scale. We also show the discovery region as a function of the Majorana neutrino mass and the effective couplings. Our results show that the LHeC may be able to discover Majorana neutrinos with masses lower than 700 GeV and 1300 GeV for electron beams settings of Ee=50 GeV and Ee=150 GeV, respectively.