Constraints on natural Maki-Nakagawa-Sakata parameters from |U e3|

Richard Lebed, Daniel R. Martin

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


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 (|Ue3|≪1). 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 |U e3| would require fine-tuning of Majorana mass matrix parameters, particularly in the context of seesaw models.

Original languageEnglish (US)
Article number013004
Pages (from-to)013004-1-013004-10
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number1
StatePublished - Jul 2004

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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