242 citations · 2.4k across the 70 of their papers we have counts for
35 papers · 1 filter
Systematic analysis of radiative symmetry breaking in models with extended scalar sector
Leonardo Chataignier, Tomislav Prokopec, Michael G. Schmidt +1
Radiative symmetry breaking (RSB) is a theoretically appealing framework for the generation of mass scales through quantum effects. It can be successfully implemented in models wit…
Single-scale Renormalisation Group Improvement of Multi-scale Effective Potentials
Leonardo Chataignier, Tomislav Prokopec, Michael G. Schmidt +1
We present a new method for renormalisation group improvement of the effective potential of a quantum field theory with an arbitrary number of scalar fields. The method amounts to…
Natural Inflation from 5D SUGRA and Low Reheat Temperature
Filipe Paccetti Correia, Michael G. Schmidt, Zurab Tavartkiladze
Motivated by recent cosmological observations of a possibly unsuppressed primordial tensor component of inflationary perturbations, we reanalyse in detail the 5D conformal SUGR…
The neutron and its role in cosmology and particle physics
Dirk Dubbers, Michael G. Schmidt
Experiments with cold and ultracold neutrons have reached a level of precision such that problems far beyond the scale of the present Standard Model of particle physics become acce…
Cold electroweak baryogenesis with Standard Model CP violation
Anders Tranberg, Andres Hernandez, Thomas Konstandin +1
We study a mechanism that generates the baryon asymmetry of the Universe during a tachyonic electroweak phase transition. We utilize as sole source of CP violation an operator that…
Bodeker's Effective Theory: From Langevin Dynamics to Dyson-Schwinger Equations
Claus Zahlten, Andres Hernandez, Michael G. Schmidt
The dynamics of weakly coupled, non-abelian gauge fields at high temperature is non-perturbative if the characteristic momentum scale is of order |k|~ g^2 T. Such a situation is ty…
Are CP Violating Effects in the Standard Model Really Tiny?
Andres Hernandez, Thomas Konstandin, Michael G. Schmidt
We derive an effective action of the bosonic sector of the Standard Model by integrating out the fermionic degrees of freedom in the worldline approach. The CP violation due to the…
Sizable CP Violation in the Bosonized Standard Model
Andres Hernandez, Thomas Konstandin, Michael G. Schmidt
Using the worldline method, we derive an effective action of the bosonic sector of the Standard Model by integrating out the fermionic degrees of freedom. The CP violation stemming…
Baryogenesis in the MSSM, nMSSM and NMSSM
Stephan J. Huber, Thomas Konstandin, Tomislav Prokopec +1
We compare electroweak baryogenesis in the MSSM, nMSSM and NMSSM. We comment on the different sources of CP violation, the phase transition and constraints from EDM measurements.
Electroweak Phase Transition and Baryogenesis in the nMSSM
Stephan J. Huber, Thomas Konstandin, Tomislav Prokopec +1
We analyze the nMSSM with CP violation in the singlet sector. We study the static and dynamical properties of the electroweak phase transition. We conclude that electroweak baryoge…
SO(10)-GUT Coherent Baryogenesis
Bjorn Garbrecht, Tomislav Prokopec, Michael G. Schmidt
A model for GUT baryogenesis, coherent baryogenesis within the framework of supersymmetric SO(10), is considered. In particular, we discuss the Barr-Raby model, where at the end of…
Axial Currents from CKM Matrix CP Violation
T. Konstandin
The first principle derivation of kinetic transport equations suggests that a CP-violating mass term during the electroweak phase transition can induce axial vector currents. Since…
Kinetic description of fermion flavor mixing and CP-violating sources for baryogenesis
Thomas Konstandin, Tomislav Prokopec, Michael G. Schmidt
We derive transport equations for fermionic systems with a space-time dependent mass matrix in flavor space allowing for complex elements leading to CP violation required for elect…
Coherent Baryogenesis and Nonthermal Leptogenesis: A comparison
Bjorn Garbrecht, Tomislav Prokopec, Michael G. Schmidt
We present a new mechanism for baryogenesis: at preheating after inflation fermions acquire a varying mass by their coupling to a time dependent field. Their CP-violating mass matr…
Transport equations for chiral fermions to order \hbar and electroweak baryogenesis: Part II
T. Prokopec, M. G. Schmidt, S. Weinstock
This is the second in a series of two papers. While in Paper I we derive semiclassical Boltzmann transport equations and study their flow terms, here we address the collision terms…
Axial Currents from CKM Matrix CP Violation and Electroweak Baryogenesis
Thomas Konstandin, Tomislav Prokopec, Michael G. Schmidt
The first principle derivation of kinetic transport equations suggests that a CP-violating mass term during the electroweak phase transition can induce axial vector currents. Since…
Coherent Baryogenesis
Bjorn Garbrecht, Tomislav Prokopec, Michael G. Schmidt
We propose a new baryogenesis scenario based on coherent production and mixing of different fermionic species. The mechanism is operative during phase transitions, at which the fer…
Kinetic approach to electroweak baryogenesis
Tomislav Prokopec, Kimmo Kainulainen, Michael G. Schmidt +1
After a short review of baryogenesis mechanisms, we focus on the charge transport mechanism at the electroweak scale, effective at strong electroweak phase transitions. Starting fr…
Precursors From $S^{(1)}/Z_2\tm Z_2'$ Orbifold GUTs
Filipe Paccetti Correia, Michael G. Schmidt, Zurab Tavartkiladze
The possibility of appearance of GUT precursors near the TeV scale (suggested by Dienes-Dudas-Gherghetta) is addressed within 5D GUTs compactified on an $S^{(1)}/Z_2\tm Z_2'$ orbif…
Varying Couplings From Orbifold GUTs
Filipe Paccetti Correia, Michael G. Schmidt, Zurab Tavartkiladze
We discuss the variation of gauge couplings in time in the framework of orbifold constructions, due to a change of the extra compact dimension's size. Models with gauge coupling un…
5D SUSY Orbifold SU(6) GUT and Pseudo-Goldstone Higgs Doublets
Filipe Paccetti Correia, Michael G. Schmidt, Zurab Tavartkiladze
We construct a 5D SUSY SU(6) GUT on an $S^{(1)}/Z_2\tm Z_2'$ orbifold. The first stage of gauge symmetry breaking occurs through compactification and a specific selection of bounda…
Gauge Coupling Unification and Phenomenology of Selected Orbifold 5D N=1 SUSY Models
Filipe Paccetti Correia, Michael G. Schmidt, Zurab Tavartkiladze
We study gauge coupling unification and various phenomenological issues, such as baryon number conservation, the problem and neutrino anomalies, within SUSY 5D orbifold models.…
Semiclassical force for electroweak baryogenesis: three-dimensional derivation
Kimmo Kainulainen, Tomislav Prokopec, Michael G. Schmidt +1
We derive a semiclassical transport equation for fermions propagating in the presence of a CP-violating planar bubble wall at a first order electroweak phase transition. Starting f…
Quantum Boltzmann equations for electroweak baryogenesis including gauge fields
Kimmo Kainulainen, Tomislav Prokopec, Michael G. Schmidt +1
We review and extend to include the gauge fields our derivation of the semiclassical limit of the collisionless quantum transport equations for the fermions in presence of a CP-vio…