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Séminaires transverses

Reassessing the window for electroweak baryogenesis

par Oleksii Matsedonskyi (Weizmann Institute)

Europe/Paris
Visioconference (IJCLab)

Visioconference

IJCLab

Description

The origin of the observed matter-antimatter asymmetry remains an open question of fundamental physics. One of the possible new physics scenarios addressing this problem is electroweak baryogenesis. It is assumed to operate in the early universe at the time of the electroweak phase transition, and requires new physics in order to make this transition first-order, and to introduce a sufficient amount of CP violation. The mass scales of this new physics are then tied to the temperature of the phase transition, about 100 GeV. I will discuss the mechanisms which allow for an increase of this temperature, thus increasing the mass scale of the new physics. Using a concrete example of EWBG scenario within a composite Higgs framework I will show that such a change in the phase transition temperature can significantly alter the phenomenological predictions of EWBG, in particular its collider signatures. 

Link Zoom:

 https://ijclab.zoom.us/j/94965576768?pwd=aDgwRDd1WThhRG54YVM1ck1tanRNUT09
Meeting ID: 949 6557 6768
Passcode: 380738