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SUMMARY:Oleksii Matsedonskyi - Reassessing the window for electroweak bary
 ogenesis - Oleksii Matsedonskyi (DAMTP)
DTSTART:20220121T160000Z
DTEND:20220121T170000Z
UID:TALK168257@talks.cam.ac.uk
CONTACT:Rene Poncelet
DESCRIPTION:*The seminar will take place in hybrid format in the Potter Ro
 om at DAMPT and via Zoom "here":https://maths-cam-ac-uk.zoom.us/j/95215212
 460?pwd=TWN5cjJ3azErSUYremw5UWRKL0NKUT09.*\n\nAbstract: Electroweak baryog
 enesis (EWBG) crucially relies on the presence of new physics which is nee
 ded to generate the first-order electroweak phase transition and a suffici
 ent amount of CP violation. In most of the previously analysed models of E
 WBG\, the electroweak phase transition happens at temperatures of about 10
 0 GeV\, and the associated new physics has to be correspondingly light. Th
 e latter fact often leads to conflicts with experimental data. I will disc
 uss a mechanism leading to high-temperature breaking of the electroweak sy
 mmetry by virtue of new fermions\, which changes the typical temperatures 
 of EWBG and increases the mass scales of the associated new physics. I wil
 l also analyse the phenomenological implications of this mechanism in a co
 ncrete model of electroweak baryogenesis in the composite Higgs framework.
LOCATION:Potter Room (B1.19)
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