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keV sterile neutrino dark matter in gauge extensions of the standard model
F. Bezrukov, H. Hettmansperger, M. Lindner
It is known that a keV scale sterile neutrino is a good warm dark matter candidate. We study how this possibility could be realized in the context of gauge extensions of the standa…
Systematic approach to leptogenesis in nonequilibrium QFT: self-energy contribution to the CP-violating parameter
M. Garny, A. Hohenegger, A. Kartavtsev +1
In the baryogenesis via leptogenesis scenario the self-energy contribution to the CP-violating parameter plays a very important role. Here, we calculate it in a simple toy model of…
Radiative Symmetry Breaking of the Minimal Left-Right Symmetric Model
Martin Holthausen, Manfred Lindner, Michael A. Schmidt
Under the assumption of classical conformal invariance, we study the Coleman-Weinberg symmetry breaking mechanism in the minimal left-right symmetric model. This model is attractiv…
On the Consistency of Perturbativity and Gauge Coupling Unification
Joachim Kopp, Manfred Lindner, Viviana Niro +1
We investigate constraints that the requirements of perturbativity and gauge coupling unification impose on extensions of the Standard Model and of the MSSM. In particular, we disc…
Systematic approach to leptogenesis in nonequilibrium QFT: vertex contribution to the CP-violating parameter
M. Garny, A. Hohenegger, A. Kartavtsev +1
The generation of a baryon asymmetry via leptogenesis is usually studied by means of classical kinetic equations whose applicability to processes in the hot and expanding early uni…
Radiative Transmission of Lepton Flavor Hierarchies
Adisorn Adulpravitchai, Manfred Lindner, Alexander Merle +1
We discuss a one loop model for neutrino masses which leads to a seesaw-like formula with the difference that the charged lepton masses replace the unknown Dirac mass matrix presen…
First hint for CP violation in neutrino oscillations from upcoming superbeam and reactor experiments
Patrick Huber, Manfred Lindner, Thomas Schwetz +1
We compare the physics potential of the upcoming neutrino oscillation experiments Daya Bay, Double Chooz, NOvA, RENO, and T2K based on their anticipated nominal luminosities and sc…
Confronting Flavour Symmetries and extended Scalar Sectors with Lepton Flavour Violation Bounds
Adisorn Adulpravitchai, Manfred Lindner, Alexander Merle
We discuss the tension between discrete flavour symmetries and extended scalar sectors arising from lepton flavour violation experiments. The key point is that extended scalar sect…
Non-Abelian Discrete Flavor Symmetries from T^2/Z_N Orbifolds
A. Adulpravitchai, A. Blum, M. Lindner
In [1] it was shown how the flavor symmetry A4 (or S4) can arise if the three fermion generations are taken to live on the fixed points of a specific 2-dimensional orbifold. The fl…