96 citations · 740 across the 17 of their papers we have counts for
7 papers · 1 filter
R symmetries and a heterotic MSSM
Rolf Kappl, Hans Peter Nilles, Matthias Schmitz
We employ powerful techniques based on Hilbert- and Groebner bases to analyze particle physics models derived from string theory. Individual models are shown to have a huge landsca…
The Cosmic Ray Antiproton Background for AMS-02
Rolf Kappl, Martin Wolfgang Winkler
The AMS-02 experiment is measuring the cosmic ray antiproton flux with high precision. The interpretation of the upcoming data requires a thorough understanding of the secondary an…
Dark Matter after BESS-Polar II
Rolf Kappl, Martin Wolfgang Winkler
The BESS-Polar collaboration has recently performed a precise measurement of the local antiproton flux which is consistent with a pure secondary production of antiprotons. We const…
New Limits on Dark Matter from Super-Kamiokande
Rolf Kappl, Martin Wolfgang Winkler
The signals observed at the direct detection experiments DAMA, CoGeNT and CRESST could be explained by light WIMPs with sizeable spin-independent cross sections with nucleons. The…
Quark mass hierarchies in heterotic orbifold GUTs
Rolf Kappl
We discuss how to calculate Yukawa couplings in string-derived orbifold GUTs. As an application we investigate the quark mass hierarchies in these models. An interplay of different…
Light dark matter in the singlet-extended MSSM
Rolf Kappl, Michael Ratz, Martin Wolfgang Winkler
We discuss the possibility of light dark matter in a general singlet extension of the MSSM. Singlino LSPs with masses of a few GeV can explain the signals reported by the CRESST, C…