Falsifying High-Scale Baryogenesis with Neutrinoless Double Beta Decay and Lepton Flavor Violation.

  • Event Date: 2015-07-16
  • Particle/String/Cosmology
  • Speaker: Dr. Wei-Chih Huang (University College London, Department of Physics and Astronomy).  /  Host: Prof. Kingman Cheung (NTHU)
    Place: Lecture Room A, 4F, 3rd General Building, Nat'l Tsing Hua Univ.

Abstract:
Interactions that manifest themselves as lepton number violating processes at low energies in combination with sphaleron transitions typically erase any pre-existing baryon asymmetry of the universe.
In this talk, I will discuss the constraints obtained from an observation of neutrinoless double beta decay in this context. If a new physics mechanism of neutrinoless double beta decay is observed, typical scenarios of high-scale baryogenesis will be excluded unless the baryon asymmetry is stabilized via some new mechanism.
I also sketch how this conclusion can be extended beyond the first lepton generation by incorporating lepton flavor violating processes.

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