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Revisiting Minimal Lepton Flavour Violation in the light of leptonic CP violation

] [INSPIRE]. [32] G. Altarelli, F. Feruglio and L. Merlo, Revisiting Bimaximal Neutrino Mixing in a Model with S4 Discrete Symmetry, JHEP 05 (2009) 020 [arXiv:0903.1940] [INSPIRE]. [33] R. de Adelhart Toorop ... , F. Bazzocchi and L. Merlo, The Interplay Between GUT and Flavour Symmetries in a Pati-Salam S4 Model, JHEP 08 (2010) 001 [arXiv:1003.4502] [34] D. Meloni, Bimaximal mixing and large 13 in a SUSY SU

ALPs effective field theory and collider signatures

We study the leading effective interactions between the Standard Model fields and a generic singlet CP-odd (pseudo-) Goldstone boson. Two possible frameworks for electroweak symmetry breaking are considered: linear and non-linear. For the latter case, the basis of leading effective operators is determined and compared with that for the linear expansion. Associated phenomenological ...

Sigma decomposition: the CP-odd Lagrangian

experiment at the LHC, Phys. Lett. B 716 (2012) 30 [arXiv:1207.7235] [INSPIRE]. [24] R. Alonso, M.B. Gavela, L. Merlo, S. Rigolin and J. Yepes, The E ective Chiral Lagrangian for a Light Dynamical \Higgs ... Particle", Phys. Lett. B 722 (2013) 330 [Erratum ibid. B 726 (2013) 926] [arXiv:1212.3305] [INSPIRE]. [25] R. Alonso, M.B. Gavela, L. Merlo, S. Rigolin and J. Yepes, Minimal Flavour Violation with Strong

Gauged lepton flavour

, Phys. Rev . D [10] R. Alonso , M.B. Gavela , L. Merlo and S. Rigolin , On the scalar potential of minimal avour [11] R. Alonso , M.B. Gavela , D. Hernandez and L. Merlo , On the Potential of Leptonic ... Minimal [12] J.R. Espinosa , C.S. Fong and E. Nardi , Yukawa hierarchies from spontaneous breaking of the [13] R. Alonso , M.B. Gavela , D. Hernandez , L. Merlo and S. Rigolin , Leptonic Dynamical [14] R

The complete HEFT Lagrangian after the LHC Run I

Higgs production at the LHC . JHEP 05 , 089 ( 2010 ). arXiv: 1002 . 1011 22. R. Alonso , M.B. Gavela , L. Merlo , S. Rigolin , J. Yepes, The effective chiral Lagrangian for a light dynamical “Higgs

Non-linear Higgs portal to Dark Matter

particles and gauge elds, Phys. Lett. 12 (1964) [42] P.W. Higgs, Broken Symmetries and the Masses of Gauge Bosons, Phys. Rev. Lett. 13 [43] R. Alonso, M.B. Gavela, L. Merlo, S. Rigolin and J. Yepes, Minimal ... Flavour Violation with Strong Higgs Dynamics, JHEP 06 (2012) 076 [arXiv:1201.1511] [INSPIRE]. [44] R. Alonso, M.B. Gavela, L. Merlo, S. Rigolin and J. Yepes, The E ective Chiral Lagrangian for a Light

Sigma decomposition

In composite Higgs models the Higgs is a pseudo-Goldstone boson of a high-energy strong dynamics. We have constructed the effective chiral Lagrangian for a generic symmetric coset, restricting to CP-even bosonic operators up to four momenta which turn out to depend on seven parameters, aside from kinetic terms. Once the same sources of custodial symmetry breaking as in the Standard ...

CP violation with a dynamical Higgs

We determine the complete set of independent gauge and gauge-Higgs CPodd effective operators for the generic case of a dynamical Higgs, up to four derivatives in the chiral expansion. The relation with the linear basis of dimension six CP-odd operators is clarified. Phenomenological applications include bounds inferred from electric dipole moment limits, and from present and future ...

Higgs ultraviolet softening

We analyze the leading effective operators which induce a quartic momentum dependence in the Higgs propagator, for a linear and for a non-linear realization of electroweak symmetry breaking. Their specific study is relevant for the understanding of the ultraviolet sensitivity to new physics. Two methods of analysis are applied, trading the Lagrangian coupling by: i) a “ghost” ...

Leptonic dynamical Yukawa couplings

A dynamical origin of the Yukawa couplings is a promising scenario to explain the flavour puzzle. The focus of this letter is set on the role of the neutrino Majorana character: when an O(2)N flavour symmetry acts on the right-handed neutrino sector, the minimum of the scalar potential allows for large mixing angles -in contrast to the simplest quark case- and predicts a maximal ...

Disentangling a dynamical Higgs

The pattern of deviations from Standard Model predictions and couplings is different for theories of new physics based on a non-linear realization of the SU(2)L × U(1)Y gauge symmetry breaking and those assuming a linear realization. We clarify this issue in a model-independent way via its effective Lagrangian formulation in the presence of a light Higgs particle, up to first order ...