Family nonuniversalZ′models with protected flavor-changing interactions
نویسندگان
چکیده
منابع مشابه
Flavor-changing scalar interactions.
The smallness of fermion masses and mixing angles has recently been been attributed to approximate global U(1) symmetries, one for each fermion type. The parameters associated with these symmetry breakings are estimated here directly from observed masses and mixing angles. It turns out that although flavor changing reaction rates may be acceptably small in electroweak theories with several scal...
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We consider a Two Higgs Doublet Model with Flavor Changing Scalar Neutral Currents arising at the tree level. All the most important constraints are taken into account and the compatibility with the present Electroweak measurements is examined. The Flavor Changing couplings involving the third family are not constrained to be very small and this allows us to predict some interesting signals of ...
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Abstract Flavor-changing and CP -violating interactions of Z ′ to fermions are generally present in models with extra U(1) gauge symmetry that are string-inspired or related to broken gauged family symmetry. We study the consequences of such couplings in fermion electric dipole moments, muon g − 2, and K and B meson mixings. From experimental limits or measured values, we constrain the off-diag...
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The quark and lepton mass matrices possess approximate flavor symmetries. Several results follow if the interactions of new scalars possess these approximate symmetries. Present experimental bounds allow these exotic scalars to have a weak scale mass. The Glashow-Weinberg criterion is rendered unnecessary. Finally, rare leptonic B meson decays provide powerful probes of these scalars, especiall...
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We have investigated the possibility of discerning mass from flavor changing neutrino interactions induced νμ → ντ oscillations in the long baseline neutrino experiments K2K and MINOS. We have found that for virtually any value of the flavor conserving parameter ǫ it will be possible to, independently, distinguish these two mechanisms at K2K, if the flavor changing parameter ǫ is in the range ǫ...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2015
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.92.015007