“Seminar of Hadron Physics”

On Friday, 17 June 2016, at 11.00 am in the Blokhintsev Hall (4 floor) of BLTP a seminar “Massive neutrino properties in magnetized environment” will be held.

Speaker: Aleksandra Dobrynina (Yaroslavl State University, Yaroslavl)

Abstract:

We performed a detailed analysis of radiative decay of sterile neutrino with mass of few dozens of keV in strong magnetic field and degenerate electronic plasma. The calculation was performed with taking into account photon dispersion relation in external active environment. The influence of electron concentration to radiative decay probability was investigated. In was shown that the presence of strong electromagnetic field weakens strong catalytic influence of plasma to decay probability.

We performed the analysis of influence of magnetic field to the properties of massive neutrino. The general expression of self-energy operator of neutrino in external magnetic field of arbitrary intensity was obtained. This expression holds under arbitrary relation between neutrino masses and charged lepton and W-boson masses. Using this mass operator we found the expression for additional energy which neutrino gains in external magnetic field. On the basis of this expression for additional energy we obtained quantum field correction to magnetic moment of neutrino.

The vertex function of virtual massive neutrino in the limit of soft real photons was calculated. During this calculation we used the method which is based on the usage of self energy neutrino operator which was calculated in linear approximation over external electromagnetic field. We showed that electric charge and electric dipole moment of real massive neutrino turns to zero and non-zero value possesses its magnetic moment.

Talk presentation