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19 papers · 1 filter
Non-Linear Axion Dynamics and Formation of Cosmological Pseudo-Solitons
Edward W. Kolb, Igor I. Tkachev
The -dimensional evolution of an inhomogeneous axion field configuration around the QCD epoch is studied numerically, including important non-linear effects due to the attra…
Instanton-Like Transitions at High Energies in (1+1) Dimensional Scalar Models
D. T. Son, V. A. Rubakov
Instanton-like transitions (``shadow processes'') are considered in (1+1) dimensional models with one scalar field whose potential is a quadratic well with a cliff. The correspondi…
Flavour Singlet Corrections to the Partial Decay Rate
K. G. Chetyrkin, A. Kwiatkowski
We analytically compute the flavour singlet radiative corrections to the partial decay rate . These corrections arise from a…
Examples of Semiclassical Instanton-Like Scattering: Massless and SU(2) Gauge Theories
D. T. Son, P. G. Tinyakov
Two-parameter sets of solutions to the classical field equations in the massless model and SU(2) gauge theory are found, each solution presumably describing a multi-particle…
The KeV Majoron as Dark Matter Particle
V. Berezinsky, J. W. F. Valle
We consider a very weakly interacting KeV majoron as dark matter particle (DMP), which provides both the critical density and the g…
Zeros of tree amplitudes at rest and symmetries of mechanical systems
M. V. Libanov, V. A. Rubakov, S. V. Troitsky
We consider the tree amplitudes of production of scalar particles by particles of another kind, where both initial and final particles are at rest and on mass shell, in…