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e- e- Collisions Mediated by Composite Neutrinos

Robert Kinyua, Eiichi Takasugi

hep-pharXiv:hep-ph/9804245

Abstract

The lepton number violating process, e- e- W- W- has been widely discussed in the Majorana neutrino exchange mechanism. Here, we discuss this process in a composite neutrino model where excited Majorana neutrinos are exchanged. We found several qualitatively different features from the neutrino exchange case: (1) The longitudinally polarized W's are not produced, (2) the neutrinoless double beta decay does not constrain much and a much larger cross section is expected, and (3) CP violating phases may be explored because all excited neutrinos are heavy so that large mixings among them are expected.

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