16 citations · 20 across the 9 of their papers we have counts for
9 papers · 1 filter
Plasma heating during the chiral plasma instability
Balin Armstrong, Andrew J. Long, Károly Seller +1
The presence of a chiral asymmetry in a relativistic plasma opens a tachyonic instability toward the growth of a helical magnetic field. We study the transfer of energy from the ch…
Energy spectrum of magnetic fields from electroweak symmetry breaking
Károly Seller, Günter Sigl
We study the magnetic fields produced in the early Universe during the electroweak symmetry breaking by considering random configurations of an inhomogeneous Higgs field. By exploi…
CP asymmetry factor in decays at finite temperature
Károly Seller, Zsolt Szép, Zoltán Trócsányi
We present in the conventional equilibrium approach to leptogenesis the complete leading order prediction for the CP asymmetry factor in finite-temperature decays involving Majoran…
CP violation at finite temperature
Károly Seller, Zsolt Szép, Zoltán Trócsányi
We present a comprehensive study of the finite temperature CP-asymmetry factor needed in the semi-classical treatment of leptogenesis originating from Majorana fermion decays into…
Real effective potentials for phase transitions in models with extended scalar sectors
Károly Seller
The effective potential is a widely used phenomenological tool to investigate phase transitions occurring in the early Universe at finite temperature. In the standard perturbative…
Real effective potentials for phase transitions in models with extended scalar sectors
Károly Seller, Zsolt Szép, Zoltán Trócsanyi
The effective potential obtained by loop expansion is usually not real in the range of field values explored by its minima during a phase transition. We apply the optimized perturb…
Sterile neutrino dark matter in the super-weak model
Károly Seller
The super-weak model is a U(1) extension of the Standard Model. In addition to a mediator , a singlet scalar field is added to deal with the meta-stability of the SM vacuum…
Sterile neutrino dark matter in a U(1) extension of the standard model
Károly Seller
We explore the possibilities of dark matter production in a U(1) extension of the standard model, also called the super-weak model. The freeze-in and freeze-out mechanisms are desc…
Sterile neutrino dark matter in a U(1) extension of the standard model
Sho Iwamoto, Károly Seller, Zoltán Trócsányi
We explore the parameter space of a U(1) extension of the standard model -- also called the super-weak model -- from the point of view of explaining the observed dark matter energy…