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A realistic U(2) model of flavor

Linster, Matthias; Ziegler, Robert

We propose a simple U(2) model of flavor compatible with an SU(5) GUT structure. All hierarchies in fermion masses and mixings arise from powers of two small parameters that control the U(2) breaking. In contrast to previous U(2) models this setup can be realized without supersymmetry and provides an excellent fit to all SM flavor observables including neutrinos. We also consider a variant of this model based on a D6 × U(1)F flavor symmetry, which closely resembles the U(2) structure, but allows for Majorana neutrino masses from the Weinberg operator. Remarkably, in this case one naturally obtains large mixing angles in the lepton sector from small mixing angles in the quark sector. The model also offers a natural option for addressing the Strong CP Problem and Dark Matter by identifying the Goldstone boson of the U(1)F factor as the QCD axion.

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Verlagsausgabe §
DOI: 10.5445/IR/1000085688
Veröffentlicht am 04.09.2018
DOI: 10.1007/JHEP08(2018)058
Zitationen: 4
Web of Science
Zitationen: 4
Zugehörige Institution(en) am KIT Institut für Theoretische Teilchenphysik (TTP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 1029-8479
KITopen-ID: 1000085688
Erschienen in Journal of high energy physics
Band 2018
Heft 8
Seiten Article: 58
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Vorab online veröffentlicht am 13.08.2018
Schlagworte Quark Masses and SM Parameters; Neutrino Physics
Nachgewiesen in Scopus
Web of Science
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