24 research outputs found
The radiative decay of a high energy neutrino in the Coulomb field of a nucleus
In the framework of the Standard Model with lepton mixing the radiative decay
of a neutrino of high () and super-high () energy is investigated in the
Coulomb field of a nucleus. Estimates of the decay probability and ``decay
cross-section'' for neutrinos of these energies in the electric field of a
nucleus permit one to discuss the general possibility of carrying out a
neutrino experiment, subject to the condition of availability in the future of
a beam of neutrinos of these high energies. Such an experiment could give
unique information on mixing angles in the lepton sector of the Standard Model
which would be independent of the specific neutrino masses if only the
threshold factor () was not close to zero. (Published in
Phys.Lett.B 323 (1994) 179).Comment: 5 pages, LaTeX, Yaroslavl, Yaroslavl State University preprint
YARU-HE-93/0
Repeated, protein-encoding heterochromatic genes cause inactivation of a juxtaposed euchromatic gene
AbstractEuchromatic genes are often silenced by rearrangements that place them within or near heterochromatin, a phenomenon known as position effect variegation (PEV). However, little is known about molecular structure of cis-acting heterochromatic fragments responsible for PEV. Here we report that heterochromatic cluster containing Stellate repeats, that encode putative regulatory subunit of protein kinase CK2 cause PEV of a reporter white `mini-gene'. It is the first example of an euchromatic gene being silenced because of the proximity to the natural, well-defined heterochromatic repeat cluster
Electromagnetic catalysis of the radiative transitions of type in the field of an intense monochromatic wave
The radiative decay of the massive neutrino
in a circularly polarized electromagnetic wave is investigated within the
Standard theory with lepton mixing. The decay probability in the wave field
does not contain a threshold factor as opposed to the
decay probability in a vacuum or in a constant uniform external field. The
phenomenon of the gigantic enhancement ( ) of the neutrino decay
probability in external wave field is discovered. The probability of the photon
splitting into the neutrino pair is obtained. (Published in Phys.Lett.B 321
(1994) 108).Comment: 10 pages, LaTeX (using emlines2.sty), Yaroslavl, Yaroslavl State
University preprint YARU-HE-93/0
Neutrino-electron processes in a dense magnetized plasma
The neutrino-electron scattering in a dense degenerate magnetized plasma
under the conditions is investigated.
The volume density of the neutrino energy and momentum losses due to this
process are calculated. The results we have obtained demonstrate that plasma in
the presence of an external magnetic field is more transparent for neutrino
than non-magnetized plasma. It is shown that neutrino scattering under
conditions considered does not lead to the neutrino force acting on plasma.Comment: 11 pages, LATEX, to be published in Central European Science Journa