KIAS HEP-PH Journal Club meeting

Friday 14 Nov 2025, 11:00 → 13:00 Asia/Seoul

=============== journal club meeting ===============

Time: Friday 11:00-12:00 (KST)

Place: Room 1423

 

- Talk Information

 

Talk1

Speaker: Dr. Michael Shamma ( Welcome Talk)

Title: Lepton Number Violation from the Early Universe to the Laboratory

References: 

Abstract:

The origin of the matter-antimatter asymmetry and neutrino masses point to new physics which violates lepton number. In this talk, I will explore how lepton-number-violating (LNV) interactions reveal themselves in distant eras of cosmological history: at future lepton colliders and in the very early universe. In the first part of the talk, I will discuss how a future same-sign lepton collider provides an immaculate environment to probe (apparent) lepton number violation through (neutrinophillic scalars) heavy neutral leptons. I will then turn to the early universe, where LNV scattering, induced through the same interaction, can simultaneously produce the observed matter-antimatter asymmetry and dark matter (DM) through ultraviolet freeze-in. Taken together, these studies highlight how the same LNV dynamics may not only have produced the matter-antimatter asymmetry and DM but also leave observable evidence at future colliders.

 

===========lunch polling===============

This week, the JC lunch will be replaced by the KIAS Scholar Connect Program. The regular JC lunch will not be provided.

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KIAS official Youtube channel:
https://www.youtube.com/channel/UCDHm-rkJk6lEApBOkj9q-ZQ

KIAS HEP-ph Youtube channel:
https://www.youtube.com/channel/UCVXTeRaZ8oFPEN40IMvgeww

You can find KIAS HEP-ph calendar:
https://indico.kias.re.kr/category/0/calendar