Asia-Pacific Workshop on Particle Physics and Cosmology 2021

Session

Dark matter 3

2 Aug 2021, 16:15

Online

Conveners

Dark matter 3

• Koichi Hamaguchi (Tokyo University)

Contribution list Timetable

12. Reshuffled SIMP Dark Matter

Shu-Yu Ho (KIAS)

02/08/2021, 16:15

In this talk, we reanalyze the multi-component strongly interacting massive particle (mSIMP) scenario using an effective operator approach. As in the single SIMP case, the total relic abundance of mSIMP dark matter (DM) depends on the coupling strengths of 3 → 2 processes achieved by a five-point effective operator. Interestingly, we find that in the dark sector there is an unavoidable 2 → 2...

13. Searching for dark photons as dark matter

Ciaran O'Hare (University of Sydney)

02/08/2021, 16:30

The dark photon is a massive hypothetical particle that interacts with the Standard Model by kinetically mixing with the visible photon. For small values of the mixing parameter, dark photons can evade cosmological bounds and be a viable dark matter candidate. Due to the similarities with the electromagnetic signals generated by axions, several bounds on dark photons are simply...

14. Cosmic-Neutrino-Boosted Dark Matter (νBDM)

Yongsoo Jho (Yonsei University)

02/08/2021, 16:45

A novel mechanism of boosting dark matter by cosmic neutrinos is proposed. The new mechanism is so significant that the arriving flux of dark matter in the mass window 1 keV ≲ m_{DM} ≲ 1 MeV on Earth can be enhanced by two to four orders of magnitude compared to one only by cosmic electrons. Thereby we firstly derive conservative but still stringent bounds and future sensitivity limits for...