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7 papers · 2 filters
Charged-lepton decays from soft flavour violation
E. H. Aeikens, W. Grimus, L. Lavoura
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 le…
More about unphysical zeroes in quark mass matrices
David Emmanuel-Costa, Ricardo Gonzalez Felipe
We look for all weak bases that lead to texture zeroes in the quark mass matrices and contain a minimal number of parameters in the framework of the standard model. Since there are…
Covariant Spectator Theory of heavy-light and heavy mesons and the predictive power of covariant interaction kernels
Sofia Leitão, Alfred Stadler, M. T. Peña +1
The Covariant Spectator Theory (CST) is used to calculate the mass spectrum and vertex functions of heavy-light and heavy mesons in Minkowski space. The covariant kernel contains L…
Elastic scattering of vortex electrons provides direct access to the Coulomb phase
I. P. Ivanov, D. Seipt, A. Surzhykov +1
Vortex electron beams are freely propagating electron waves carrying adjustable orbital angular momentum with respect to the propagation direction. Such beams were experimentally r…
When the C in CP does not matter: anatomy of order-4 CP eigenstates and their Yukawa interactions
Alfredo Aranda, Igor P. Ivanov, Enrique Jiménez
We explore the origin and Yukawa interactions of the scalars with peculiar CP-properties which were recently found in a multi-Higgs model based on an order-4 CP symmetry. We relate…
The vacuum structure of the Higgs complex singlet-doublet model
P. M. Ferreira
The complex singlet-doublet model is a popular theory to account for dark matter and electroweak baryogenesis, wherein the Standard Model particle content is supplemented by a comp…