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Sep 27 – 30, 2016
DESY Hamburg
Europe/Berlin timezone

Falsifying Baryogenesis Mechanisms through Observation of Lepton Number and Flavor Violation

Sep 28, 2016, 5:30 PM
Seminar room 2 (DESY Hamburg)

Seminar room 2

DESY Hamburg

Notkestrasse 85, 22607 Hamburg
Cosmology & Astroparticle Physics Parallel Session: Cosmology & Astroparticle Physics


Dr Julia Harz (ILP / LPTHE Paris)


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. We demonstrate in a model independent approach that the observation of neutrinoless double beta decay would impose a stringent constraint on mechanisms of high-scale baryogenesis, including leptogenesis scenarios. Further, we discuss the potential of the LHC to model independently exclude high-scale leptogenesis scenarios when observing lepton number violating processes. In combination with the observation of lepton flavor violating processes, we can further strengthen this argument, closing the loophole of asymmetries being stored in different lepton flavors.

Primary author

Dr Julia Harz (ILP / LPTHE Paris)


Dr Frank Deppisch (University College London) Prof. Heinrich Paes (TU Dortmund) Prof. Martin Hirsch (IFIC Valencia / University of Valencia) Dr Weih-Chih Huang (TU Dortmund)

Presentation materials