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24 papers · 2 filters
First extraction of valence transversities in a collinear framework
Alessandro Bacchetta, A. Courtoy, Marco Radici
We present an extraction of the valence transversity parton distributions based on an analysis of pion-pair production in deep-inelastic scattering off transversely polarized targe…
Scalar triplet leptogenesis without right-handed neutrino decoupling
D. Aristizabal Sierra
We discuss leptogenesis in the context of type-II seesaw in the case in which in addition to the scalar electroweak triplet decays the lepton asymmetry is also induced by right-han…
LSP sneutrino decays into heavy standard model pairs
D. Aristizabal Sierra, D. Restrepo, S. Spinner
In bilinear R-parity violation (BRpV), in which the superpotential includes a bilinear term between the lepton doublet and the up-type Higgs superfields, a sneutrino LSP can decay…
Symmetries in multi-Higgs-doublet models
I. P. Ivanov, E. Vdovin
We report the recent progress in understanding of symmetries which can be implemented in the scalar sector of electroweak symmetry breaking models with several Higgs doublets. In p…
Evading death by vacuum
A. Barroso, P. M. Ferreira, I. P. Ivanov +2
In the Standard Model, the Higgs potential allows only one minimum at tree-level. But the open possibility that there might be two scalar doublets enriches the vacuum structure, al…
Geometric minimization of highly symmetric potentials
Audrey Degee, Igor P. Ivanov, Venus Keus
In non-minimal Higgs mechanisms, one often needs to minimize highly symmetric Higgs potentials. Here we propose a geometric way of doing it, which, surprisingly, is often much more…