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20 papers · 2 filters
Renormalization of the nonequilibrium dynamics of fermions in a flat FRW universe
J. Baacke, C. Patzold
We derive the renormalized equations of motion and the renormalized energy-momentum tensor for fermions coupled to a spatially homogeneous scalar field (inflaton) in a flat FRW geo…
Spinodal Decomposition and Inflation: Dynamics and Metric Perturbations
D. Cormier, R. Holman
We analyse the dynamics of spinodal decomposition in inflationary cosmology using the closed time path formalism of out of equilibrium quantum field theory combined with the non-pe…
Massive Neutrinos in Astrophysics
G. G. Raffelt, W. Rodejohann
An introduction to various topics in neutrino astrophysics is given for students with little prior exposure to this field. We explain neutrino production and propagation in stars,…
Rescattering Effects for (ε'/ε)
E. A. Paschos
A calculation of the hadronic matrix elements for K\toππincluding π-πrescattering effects in a dispersion integral is presented. I study the dependence of the results on the matchi…
Searching for Rephase-Invariant CP- and CPT-violating Observables in Meson Decays
K. C. Chou, W. Palmer, E. A. Paschos +1
We present a general model-independent and rephase-invariant formalism that cleanly relates CP and CPT noninvariant observables to the fundamental parameters. Different types of CP…
Bounds on effective Majorana neutrino masses at HERA
Marion Flanz, Werner Rodejohann, Kai Zuber
The lepton-number violating process e p \to nu_e l l' X mediated by Majorana neutrinos is studied for the HERA collider for (l l') = (e tau), (mu tau), (mu mu) and (tau tau). Only…