Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8187202 | Physics Letters B | 2018 | 6 Pages |
Abstract
If light new physics with lepton-flavor-violating couplings exists, the prime discovery channel might not be ââââ²Î³ but rather ââââ²X, where the new boson X could be an axion, majoron, familon or Zâ² gauge boson. The most conservative bound then comes from ââââ²+inv, but if the on-shell X can decay back into leptons or photons, displaced-vertex searches could give much better limits. We show that only a narrow region in parameter space allows for displaced vertices in muon decays, μâeX,Xâγγ,ee, whereas tauon decays can have much more interesting signatures.
Related Topics
Physical Sciences and Engineering
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Authors
Julian Heeck, Werner Rodejohann,