4 papers
Nondegenerate Fermions in the Background of the Sphaleron Barrier
Guido Nolte, Jutta Kunz, Burkhard Kleihaus
We consider level crossing in the background of the sphaleron barrier for nondegenerate fermions. The mass splitting within the fermion doublets allows only for an axially symmetri…
Gradient Approach to the Sphaleron Barrier
Guido Nolte, Jutta Kunz
We apply the gradient approach to obtain a path over the sphaleron barrier and to demonstrate the fermionic level crossing phenomenon. Neglecting the mixing angle dependence and as…
The Sphaleron Barrier in the Presence of Fermions
Guido Nolte, Jutta Kunz
We calculate the minimal energy path over the sphaleron barrier in the pre\-sen\-ce of fermions, assuming that the fermions of a doublet are degenerate in mass. This allows for sph…
Fermions in the background of the sphaleron barrier
Jutta Kunz, Yves Brihaye
We demonstrate the level crossing phenomenon for fermions in the background field of the sphaleron barrier, by numerically determining the fermion eigenvalues along the minimal ene…