Quasi-localized wavefunctions on magnetized tori and tiny neutrino Yukawa couplings

Keigo Sumita

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    Abstract

    Abstract: This paper shows that, a quasi-localization of wavefunctions in toroidal compactifications with magnetic fluxes can lead to a strong suppression for relevant Yukawa couplings, and it is applicable to obtain tiny neutrino masses. Although it is known that magnetic fluxes lead to a Gaussian profile of zero-modes on a torus and that can yield a suppressed coupling in higher-dimensional supersymmetric Yang-Mills (SYM) theories, the largest (diagonal) entry of Yukawa matrices is always of (Formula presented.). In this paper, we propose a way to induce an absolutely tiny global factor of Yukawa matrices. In two SYM theories defined in different dimensional spacetime, their bifundamental representations must be localized as a point in some directions. Overlaps of such point-like localized wavefunctions and Gaussian zero-modes give a global factor of Yukawa matrices, and it can be a strong suppression factor or a usual (Formula presented.) factor, corresponding to their distance. Our numerical analysis shows that it is possible to obtain a suppression strong enough to realize the tiny neutrino masses without a fine-tuning. Furthermore, we propose a concrete model in a magnetized SYM system and demonstrate the mechanism to generate the tiny neutrino Yukawa couplings.

    Original languageEnglish
    Article number67
    Pages (from-to)1-14
    Number of pages14
    JournalJournal of High Energy Physics
    Volume2016
    Issue number1
    DOIs
    Publication statusPublished - 2016 Jan 1

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    Keywords

    • Phenomenology of Field Theories in Higher Dimensions

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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