Journal of High Energy Physics

, 2019:29 | Cite as

Loop-enhanced rate of neutrinoless double beta decay

  • Werner Rodejohann
  • Xun-Jie XuEmail author
Open Access
Regular Article - Theoretical Physics


Neutrino masses can be generated radiatively. In such scenarios their masses are calculated by evaluating a self-energy diagram with vanishing external momentum, i.e. taking only the leading order term in a momentum expansion. The difference between the full self-energy and the mass is experimentally difficult to access, since one needs off-shell neutrinos to observe it. However, massive Majorana neutrinos that mediate neutrinoless double beta decay (0νββ) are off-shell, with the virtuality of order 100 MeV. If the energy scale of the self-energy loop is of the order of this virtuality, the amplitude of double beta decay can be modified by the unsuppressed loop effect. This can have a drastic impact on the interpretation of future observations or limits of the 0νββ decay.


Beyond Standard Model Neutrino Physics 


Open Access

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Copyright information

© The Author(s) 2019

Authors and Affiliations

  1. 1.Max-Planck-Institut für KernphysikHeidelbergGermany

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