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State-of-the-Art Tests of Lepton Number Violation and Seesaw Mechanisms

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If you have a question about this talk, please contact Damien George.

The discoveries of nonzero neutrino masses and a SM-like Higgs force us to contemplate that Yukawa couplings may span at least 12 order of magnitude. However, permitting that lepton number is not a fundamental symmetry of nature at low energies, Seesaw mechanisms can alleviate this problem.This talk will focus on recent developments of two tests that directly probe the large class of Seesaw models that feature a heavy neutrino (Dirac, Pseudo-Dirac, or Majorana), in particular: heavy neutrino production via a resonant, s-channel W’ (with arbitrary chiral couplings) and through W-photon fusion. The robustness and discovery potential of these tests at current and future hadron colliders will be discussed in detail. Recent LHC results will also be addressed.

This talk is part of the HEP phenomenology joint Cavendish-DAMTP seminar series.

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