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We study leptons in holographic composite Higgs models, neutrinos, based on non-abelian discrete symmetries of the form <\/span>G<\/span>f <\/span>= <\/span>X <\/span>\u00d7 <\/span>Z<\/span>N<\/span>. The flavour symnmetry is broken to <\/span>Z<\/span>2 <\/span>\u00d7<\/span>Z<\/span>2 <\/span>\u00d7<\/span>Z<\/span>N <\/span>in the Z<\/span>N <\/span>\u2282 <\/span>X <\/span>and the external
\nnamely in models<\/span> possibly admitting a weakly coupled description in terms
\nof five-dimensional (5D) theories. We introduce two scenarios leading to
\nMajorana or Dirac<\/span><\/p>\n
\nelementary sector and to <\/span>Z<\/span>(<\/span>D<\/span>)<\/span> N <\/span>in the composite
\nsector, with <\/span>Z<\/span>(<\/span>D<\/span>)<\/span> N <\/span>being the
\ndiagonal subgroup of a<\/span> <\/p>\n
\n<\/span>Z<\/span>N<\/span>. The
\nsmallness of neutrino masses is naturally explainedand normal\/inverted mass
\nordering can be accommodated. By choosing X <\/span>= <\/span>\u0394(96) or <\/span>\u0394(384), a non-vanishing <\/span><\/span>\u03b8<\/span>13 <\/span>of order 0.1 is
\nnaturally obtained. We apply our considerations to a 5D model in warped space
\nfor the particular cases of <\/span>X <\/span>= <\/span>S<\/span>4<\/span>,A<\/span>5<\/span>,<\/span>\u0394(96) and <\/span>\u0394(384) and <\/span><\/span>N <\/span>= 3 or 5.
\nLepton flavour violating processes and electric dipole moments are well below the
\ncurrent bounds, with the exception of <\/span>\u03bc <\/span>\u2192 <\/span>e<\/span>\u03b3 <\/span>that puts a very mild constraint on the
\nparameter <\/span>space of the model, for all presented choices of <\/span>G<\/span>f <\/span>.<\/span>“<\/span><\/span><\/p>\n","protected":false},"featured_media":0,"template":"","tags":[],"seminar_category":[53],"acf":{"s_now_accepting":true,"s_date_order":"2011-12-15 16:30:00","s_date_end":null,"s_date_text":"","s_text":"Marco Serone","s_place":"KMI Science Symposia (ES635)","s_place_other":"","s_categoryother":"","s_poster":"