New parametrization of the seesaw mechanism and applications in supersymmetric models

John Ellis, Junji Hisano, Martti Raidal, Yasuhiro Shimizu

Research output: Contribution to journalArticlepeer-review

192 Citations (Scopus)


We present a new parametrization of the minimal seesaw model, expressing the heavy-singlet neutrino Dirac Yukawa couplings (Formula presented) and Majorana masses (Formula presented) in terms of effective light-neutrino observables and an auxiliary Hermitian matrix H. In the minimal supersymmetric version of the seesaw model, the latter can be related directly to other low-energy observables, including processes that violate charged lepton flavor and (Formula presented) This parametrization enables one to respect the stringent constraints on muon-number violation while studying the possible ranges for other observables by scanning over the allowed parameter space of the model. Conversely, if any of the lepton-flavor-violating process is observed, this measurement can be used directly to constrain (Formula presented) and (Formula presented) As applications, we study flavor-violating (Formula presented) decays and the electric dipole moments of leptons in the minimal supersymmetric seesaw model.

Original languageEnglish
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number11
Publication statusPublished - 2002
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'New parametrization of the seesaw mechanism and applications in supersymmetric models'. Together they form a unique fingerprint.

Cite this