Constraints on natural Maki-Nakagawa-Sakata parameters from [Formula Presented]

Richard Lebed, Daniel R. Martin

Research output: Contribution to journalArticlepeer-review


The MNS matrix structure emerging as a result of recent neutrino measurements strongly suggests two large mixing angles (solar and atmospheric) and one small angle [Formula Presented] Especially when combined with the neutrino mass hierarchy, these values turn out to impose rather stringent constraints on possible flavor models connecting the three active fermion generations. Specifically, we show that an extremely small value of [Formula Presented] would require fine-tuning of Majorana mass matrix parameters, particularly in the context of seesaw models.

Original languageEnglish (US)
Pages (from-to)10
Number of pages1
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number1
StatePublished - 2004

ASJC Scopus subject areas

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

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