Институт теоретической и математической физики

МГУ имени М.В. Ломоносова

ITMP Seminar "Phase transitions in the dark Universe"

ITMP Seminar
17 октября 2022

Dear Colleagues,

We are pleased to announce that the next ITMP seminar will be held on Wednesday, Oct 19, 18:00 (Moscow time). It will be arranged via zoom.

Speaker: Dr. Sabir Ramazanov, CEICO, Prague

Title: Phase transitions in the dark Universe

Abstract: Typically phase transitions are associated with a constant scale of symmetry breaking. In cosmology, however, a different situation is also natural: the expectation value of a scalar field responsible for symmetry breaking can be induced by its interactions with hot primordial plasma, in which case the expectation value decreases as the Universe cools down. This picture can be realized in a simple renormalizable and approximately scale-invariant scenario. Non-trivial time-dependence of the symmetry breaking scale enables new mechanisms of particle production at phase transitions. These particles can be considered for the role of dark matter. Another phenomenologically interesting outcome of phase transitions is formation of topological defects, which serve as a source of potentially observable gravitational waves. The latter can be used to probe the underlying model in a very weakly coupled regime inaccessible by other experiments.


If you want to join the seminar please register here before 16:00, October 19.

If you would like to subscribe to newsletters about ITMP seminars, please, contact seminar@itmp.msu.ru



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