Quark mixing in the discrete dark matter model

Apr, 2011
10 pages
Published in:
  • Nucl.Phys.B 856 (2012) 670-681
  • Published: 2012
e-Print:

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Abstract: (Elsevier)
We consider a model in which dark matter is stable as it is charged under a Z 2 symmetry that is residual after an A 4 flavour symmetry is broken. We consider the possibility to generate the quark masses by charging the quarks appropriately under A 4 . We find that it is possible to generate the CKM mixing matrix by an interplay of renormalisable and dimension-six operators. In this set-up, we predict the third neutrino mixing angle to be large and the dark matter relic density to be in the correct range. Low energy observables – in particular meson–antimeson oscillations – are hard to facilitate. We find that only in a situation where there is a strong cancellation between the Standard Model contribution and the contribution of the new Higgs fields, B meson oscillations are under control.
Note:
  • 10 pages, 4 figures; version 3 as appeared in Nuclear Physics B
  • 11.30.H
  • 14.80.Cp
  • 14.60.P
  • 14.60.-
  • Discrete flavour symmetries
  • Dark matter
  • Meson oscillations
  • dark matter: relic density
  • quark: mixing
  • quark: mass