Zobrazeno 1 - 10
of 575
pro vyhledávání: '"Grimus, W."'
We consider the one-loop radiative corrections to the light-neutrino mass matrix and their consequences for the predicted branching ratios of the five lepton-flavour-violating decays $\ell_1^- \to \ell_2^- \ell_3^+ \ell_3^-$ in a two-Higgs-doublet mo
Externí odkaz:
http://arxiv.org/abs/2009.13479
Autor:
Grimus, W., Lavoura, L.
Cobimaximal lepton mixing, i.e. $\theta_{23} = 45^\circ$ and $\delta = \pm 90^\circ$ in the lepton mixing matrix $V$, arises as a consequence of $S V = V^\ast \mathcal{P}$, where $S$ is the permutation matrix that interchanges the second and third ro
Externí odkaz:
http://arxiv.org/abs/1708.09809
Publikováno v:
Int. J. of Mod. Phys. A Vol. 33 (2018) 1850019 (27 pages)
We consider a model with arbitrary numbers of Majorana fermion fields and real scalar fields $\varphi_a$, general Yukawa couplings and a $\mathbb{Z}_4$ symmetry that forbids linear and trilinear terms in the scalar potential. Moreover, fermions becom
Externí odkaz:
http://arxiv.org/abs/1705.09589
We consider a two-Higgs-doublet extension of the Standard Model, with three right-handed neutrino singlets and the seesaw mechanism, wherein all the Yukawa-coupling matrices are lepton flavour-diagonal and lepton flavour violation is soft, originatin
Externí odkaz:
http://arxiv.org/abs/1612.00724
Autor:
Grimus, W., Löschner, M.
In this review, we present a derivation of the on-shell renormalization conditions for scalar and fermionic fields in theories with and without parity conservation. We also discuss the specifics of Majorana fermions. Our approach only assumes a canon
Externí odkaz:
http://arxiv.org/abs/1606.06191
We present a scotogenic model, i.e. a one-loop neutrino mass model with dark right-handed neutrino gauge singlets and one inert dark scalar gauge doublet $\eta$, which has symmetries that lead to co-bimaximal mixing, i.e. to an atmospheric mixing ang
Externí odkaz:
http://arxiv.org/abs/1604.07777
In the context of a renormalizable supersymmetric SO(10) Grand Unified Theory, we consider the fermion mass matrices generated by the Yukawa couplings to a $\mathbf{10} \oplus \mathbf{120} \oplus \bar{\mathbf{126}}$ representation of scalars. We perf
Externí odkaz:
http://arxiv.org/abs/1510.02641
Autor:
Fonseca, R. M., Grimus, W.
The classification of lepton mixing matrices from finite residual symmetries is reviewed, with emphasis on the role of vanishing sums of roots of unity for the solution of this problem.
Comment: 6 pages, no figures, talk presented at XXXIX Inter
Comment: 6 pages, no figures, talk presented at XXXIX Inter
Externí odkaz:
http://arxiv.org/abs/1510.01912
We discuss renormalization in a toy model with one fermion field and one real scalar field phi, featuring a spontaneously broken discrete symmetry which forbids a fermion mass term and a phi^3 term in the Lagrangian. We employ a renormalization schem
Externí odkaz:
http://arxiv.org/abs/1406.7795
Autor:
Grimus, W., Lavoura, L.
We present a general framework for models in which the lepton mixing matrix is the product of the maximal mixing matrix U_\omega\ times a matrix constrained by a well-defined Z_2 symmetry. Our framework relies on neither supersymmetry nor non-renorma
Externí odkaz:
http://arxiv.org/abs/1309.3186