Speaker
Dr
Roman Nevzorov
(University of Glasgow)
Description
In the minimal supersymmetric standard model (MSSM) and Minimal Non--minimal
Supersymmetric Standard Model (MNSSM) the lightest neutralino can be absolutely
stable providing a good candidate for the cold dark matter component of the Universe.
At the same time the \mu problem of the MSSM is solved within MNSSM without
accompanying problems related with the appearance of domain walls. In contrast with
the MSSM the allowed range of the mass of the lightest neutralino in the MNSSM is
limited. We establish the theoretical upper bound on the lightest neutralino mass in
the framework of this model. We also obtain an approximate solution for the mass of
the corresponding particle. The lightest neutralino is predominantly a singlino so
that its couplings to Z boson and other observed particles are suppressed in the
considered model.
Author
Dr
Roman Nevzorov
(University of Glasgow)
Co-authors
Dr
David Miller
(University of Glasgow)
Dr
Gudrid Moortgat-Pick
(Durham University)
Dr
Michael Trusov
(ITEP)
Dr
Stefan Hesselbach
(University of Southampton)
