Grad School Physics Seminar 2025/26

Europe/Warsaw
Room 207 (NCBJ)

Room 207

NCBJ

Pasteura 7
Description

Physics seminar of the Graduate School of NCBJ.

GoToMeeting link for the seminar: https://app.gotomeeting.com/?meetingId=434622613

  • Thursday, 9 October
    • 09:15 09:35
      Welcoming Talk of the Graduate School Director¶ 20m
      Speaker: Prof. Michał Spaliński
    • 09:35 09:55
      Discussion about the goals and organization of the PhD seminar¶ 20m
      Speakers: Anna Durkalec (National Centre for Nuclear Research), Jakub Wagner (National Centre for Nuclear Research), Michal Bluj (NCBJ)
  • Thursday, 16 October
    • 09:15 09:35
      Production of Self Interacting Scalars in the Early Universe 20m

      In this talk, I will present an overview of my research on Dark Matter (DM). I will begin with a brief introduction to the study of DM across different approaches, before focusing on Cannibal DM produced via the freeze-in mechanism in the early Universe. I will discuss the non-trivial thermal dynamics of this scenario and the importance of tracking the DM temperature evolution. I will then outline the resulting detectability prospects, which become viable in non-standard cosmological histories, particularly when the early Universe is dominated by a cold inflaton field. In the second part, I will turn to cosmological phase transitions, emphasizing how first-order transitions can generate observable gravitational waves (GWs). Finally, I will show that an inverse phase transition can occur within the freeze-in framework, where cannibalization dynamics crucially modify the evolution of the transition and the associated GW phenomenology, potentially within reach of future interferometer experiments.

      Speaker: Juan Esau Cervantes Hernandez (NCBJ Warsaw)
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