Webinar〝Probing Leptogenesis with the Cosmological Collider〞

In this talk the speaker will first review the recent development and opportunities addressing the profound puzzle of matter-antimatter asymmetry in our Universe, as a general motivation. Then she will introduce a cosmological probe for a compelling solution to the puzzle, leptogenesis, which is generally challenging to directly test due to the very high energy scales involved. In particular, she and her team propose a new probe for leptogenesis with cosmological collider physics. With the example of a cosmological Higgs collider, they demonstrate that during inflation leptogenesis models can produce detectable primordial non-Gaussianity with distinctive oscillatory patterns that encode information about the lepton-number violating couplings, the Majorana right-hand neutrino masses, and the Charge-Parity(CP) phases, which are essential to leptogenesis. The detection prospect with upcoming astrophysical observations will also be discussed.

時間:2022.11.10(四) 02:00~03:20
頻道:(網上講授)Zoom ID:421-480-1692 ← cosmology
講者:Yanou Cui(University of California, Riverside)



“Copernicus Webinar and Colloquium Series”: To promote scientific discussions during this pandemic, they are organizing an online seminar series, i.e. Copernicus Webinar Series, seeking the most outstanding speakers to introduce innovative ideas and important progress in the field of gravity and cosmology. This series is named after the famous Polish Astronomer, Nicolaus Copernicus, whose discovery eventually marked the dawn of modern science.




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