18 citations · 31 across the 3 of their papers we have counts for
5 papers
Landau-Zener problem in a three-level neutrino system with non-linear time dependence
P. Keränen, J. Maalampi, M. Myyryläinen +1
We consider the level-crossing problem in a three-level system with non-linearly time-varying Hamiltonian (time-dependence ). We study the validity of the so-called indepen…
Effects of degenerate sterile neutrinos on the supernova neutrino flux
P. Keranen, J. Maalampi, M. Myyrylainen +1
We consider the possibility that there exist sterile neutrinos which are closely degenerate in mass with the active neutrinos and mixed with them. We investigate the effects of thi…
A supernova constraint on bulk majorons
Steen Hannestad, Petteri Keranen, Francesco Sannino
In models with large extra dimensions all gauge singlet fields can in principle propagate in the extra dimensional space. We have investigated possible constraints on majoron model…
Searching Scalar Resonances with Ultra-high Energy Neutrinos
Lars Brücher, Petteri Keränen, Jukka Maalampi
We study the prospects of detecting signals of a resonant scattering of high-energy cosmic neutrinos on electrons in the atmosphere. Such a process is possible through an s-channel…
Testing exotic neutrino-neutrino interactions with AGN neutrinos
Petteri Keränen
We propose a test for non-standard neutrino-neutrino interactions by using ultrahigh energy AGN neutrinos. Such interactions would influence the AGN neutrino flux due to collisions…