Implications of neutrino masses on the KL?p0?? decay

@article{Perez1999ImplicationsON,
  title={Implications of neutrino masses on the KL?p0?? decay},
  author={Gilad Perez},
  journal={Journal of High Energy Physics},
  year={1999}
}
  • G. Perez
  • Published 1 July 1999
  • Physics
  • Journal of High Energy Physics
We calculate the different contributions to the decay $K_{L}\to \pi ^{0}\nu \bar{\nu}$ that arise if the neutrinos are massive. In spite of a chiral enhancement factor, we find that these contributions are negligibly small. Compared to the CP violating leading contributions, the CP conserving contributions related to Dirac masses are suppressed by a factor of order $(m_K m_\nu/m_W^2)^2\lesssim10^{-12}$, and those related to Majorana masses are suppressed by a factor of order $(\alpha_W m_K m_s… 

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