88 citations · 124 across the 10 of their papers we have counts for
10 papers
Freeze-in baryogenesis and early matter domination
Ioannis Dalianis, Andreas Goudelis, Dimitrios Karamitros +2
The freeze-in mechanism has been shown to allow the simultaneous generation of cosmic dark matter and a viable matter-antimatter asymmetry in the universe. When the underlying inte…
Ultraviolet freeze-in baryogenesis
Andreas Goudelis, Dimitrios Karamitros, Pantelis Papachristou +1
We study a mechanism through which the cosmic dark matter density can be explained simultaneously with the observed baryon asymmetry of the Universe. At the core of our proposal li…
Mechanism for baryogenesis via feebly interacting massive particles
Andreas Goudelis, Pantelis Papachristou, Vassilis C. Spanos
We present a simple mechanism which allows the simultaneous generation of the baryon asymmetry of the Universe along with its dark matter content. To this goal, we employ the out-o…
Quantum versus Classical Dynamics in a driven barrier: the role of kinematic effects
P. K. Papachristou, E. Katifori, F. K. Diakonos +2
We study the dynamics of the classical and quantum mechanical scattering of a wave packet from an oscillating barrier. Our main focus is on the dependence of the transmission coeff…
A nonlinear classical model for the decay widths of Isoscalar Giant Monopole Resonances
P. K. Papachristou, E. Mavrommatis, V. Constantoudis +2
The decay of the Isoscalar Giant Monopole Resonance (ISGMR) in nuclei is studied by means of a nonlinear classical model consisting of several noninteracting nucleons (particles) m…
Hyperacceleration in a stochastic Fermi-Ulam model
A. K. Karlis, P. K. Papachristou, F. K. Diakonos +2
Fermi acceleration in a Fermi-Ulam model, consisting of an ensemble of particles bouncing between two, infinitely heavy, stochastically oscillating hard walls, is investigated. It…