DOI: 10.1140/epjc/s2003-01133-5
The spontaneous generation of magnetic fields at high temperature in a supersymmetric theory
V.I. Demchik and V.V. SkalozubDniepropetrovsk National University, 49050 Dniepropetrovsk, Ukraine
(Received: 18 October 2002 / Revised version: 23 December 2002 / Published online: 3 March 2003 )
Abstract
The spontaneous generation of magnetic and chromomagnetic fields
at high temperature in the minimal supersymmetric standard model
is investigated. The consistent effective potential
including the one-loop and the daisy diagrams of all bosons and
fermions is calculated and the magnetization of the vacuum is
observed. The mixing of the generated fields due to the quark
and
s-quark loop diagrams and the role of superpartners are studied
in
detail. It is found that the contribution of these diagrams
increases the magnetic and chromomagnetic field strengths as
compared with the case of a separate generation of fields. The
magnetized vacuum state is found to be stable due to the magnetic
masses of gauge fields included in the daisy diagrams.
Applications of the results obtained are discussed. A comparison
with the standard model case is given.
© Società Italiana di Fisica, Springer-Verlag 2003
