Flavour and CP predictions from orbifold compactification
Abstract
We propose a theory for fermion masses and mixings in which an A_{4} family symmetry arises naturally from a sixdimensional spacetime after orbifold compactification. The flavour symmetry leads to the successful "golden" quarklepton unification formula. The model reproduces oscillation parameters with good precision, giving sharp predictions for the CP violating phases of quarks and leptons, in particular δ^{ℓ} ≃ +268^{∘}. The effective neutrinoless doublebeta decay mass parameter is also sharply predicted as 〈m_{ββ} 〉 ≃ 2.65meV.
 Publication:

Physics Letters B
 Pub Date:
 February 2020
 DOI:
 10.1016/j.physletb.2019.135195
 arXiv:
 arXiv:1910.05605
 Bibcode:
 2020PhLB..80135195D
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 11 pages, 3 figures. v2: matches published version. Note title change