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52 papers · 2 filters
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…
Quantum field theory and the Standard Model
W. Hollik
In this lecture we discuss the basic ingredients for gauge invariant quantum field theories. We give an introduction to the elements of quantum field theory, to the construction of…
Light shining through walls
Javier Redondo, Andreas Ringwald
Shining light through walls? At first glance this sounds crazy. However, very feeble gravitational and electroweak effects allow for this exotic possibility. Unfortunately, with pr…
SecDec: A general program for sector decomposition
Jonathon Carter, Gudrun Heinrich
We present a program for the numerical evaluation of multi-dimensional polynomial parameter integrals. Singularities regulated by dimensional regularisation are extracted using ite…
W-+ H+- production and CP asymmetry at the LHC
Dao Thi Nhung, Wolfgang Hollik, Le Duc Ninh
The dominant contributions to W-+ H+- production at the LHC are the tree-level b anti-b annihilation and the gg fusion. We perform for the case of the complex MSSM a complete calcu…
Gamma-Ray Lines from Radiative Dark Matter Decay
Mathias Garny, Alejandro Ibarra, David Tran +1
The decay of dark matter particles which are coupled predominantly to charged leptons has been proposed as a possible origin of excess high-energy positrons and electrons observed…