Signatures for Majorana neutrinos in $e^{-}\gamma$ collider

Abstract

We study the possibilities to detect Majorana neutrinos in $e^{-}\gamma$ colliders for different center of mass energies. We study the $W^{-}{W}^{-}{l}_j^{+}(l_j^{+}\equiv e^{+},{\mu }^{+},{\tau }^{+})$ final state which are, due to leptonic number violation, a clear signature for intermediate Majorana neutrino contribution. Such a signal (final lepton have the opposite charge of the initial lepton) is not possible if the heavy neutrinos are Dirac particles. In our calculation we use the helicity formalism to obtain analytic expressions for the amplitude and we have considered that the intermediate neutrinos can be either on shell or off shell. Finally we present our results for the total cross-section and for the angular distribution of the final lepton. We also include a discussion on the expected events number as a function of the input parameters.

Latex file with 12 pages and 6 figures. Submited to Phys. Rev. D

Cited by in corpus (10)

• Resonant CP Violation due to Heavy Neutrinos at the LHC
• Majorana neutrinos production at LHeC in an effective approach
• Majorana neutrino decay in an Effective Approach
• Heavy Majorana Neutrino Production at e- gamma Colliders
• Effective Majorana neutrino decay
• Majorana Neutrinos Production at NLC in an Effective Approach
• Double seesaw mechanism in a left-right symmetric model with TeV neutrinos
• New heavy charged leptons at future high energy electron-positron colliders
• Signals for Majorana neutrinos in a $\gamma \gamma$ collider
• Signatures of Right-Handed Majorana neutrinos and gauge bosons in $e\gamma$ Collisions