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11 papers · 2 filters
Stability in the instantaneous Bethe-Salpeter formalism: reduced exact-propagator bound-state equation with harmonic interaction
Z. -F. Li, Wolfgang Lucha, F. Schoberl
Several numerical investigations of the Salpeter equation with static confining interactions of Lorentz-scalar type revealed that its solutions are plagued by instabilities of pres…
A precision constraint on multi-Higgs-doublet models
W. Grimus, L. Lavoura, O. M. Ogreid +1
We derive a general expression for Delta rho (or, equivalently, for the oblique parameter T) in the SU(2) x U(1) electroweak model with an arbitrary number of scalar SU(2) doublets…
A_4 model for the quark mass matrices
L. Lavoura, H. Kuhbock
We propose a model for the quark masses and mixings based on an A_4 family symmetry. Three scalar SU(2) doublets form a triplet of A_4. The three left-handed-quark SU(2) doublets a…
Electroweak and QCD corrections to Higgs production via vector-boson fusion at the LHC
Mariano Ciccolini, Ansgar Denner, Stefan Dittmaier
The radiative corrections of the strong and electroweak interactions are calculated at next-to-leading order for Higgs-boson production in the weak-boson-fusion channel at hadron c…
Radiative corrections to W-boson hadroproduction: higher-order electroweak and supersymmetric effects
Silja Brensing, Stefan Dittmaier, Michael Krämer +1
The high accuracy envisaged for future measurements of W-boson production at hadron colliders has to be matched by precise theoretical predictions. We study the impact of electrowe…
Embedding the Zee-Wolfenstein neutrino mass matrix in an SO(10) x A4 GUT scenario
W. Grimus, H. Kuhbock
We consider renormalizable SO(10) Yukawa interactions and put the three fermionic 16-plets into the 3-dimensional irreducible A_4 representation. Scanning the possible A_4 represen…