e-e- Collisions Mediated by Composite Neutrinos.

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  • e￣e￣ Collisons Mediated by Composite Neutrinos
  • e e Collisons Mediated by Composite Neu

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

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