[seminar] [Danas] Ko Pyung-won, 09.04. (utorak) 15h (c.t.), seminar ZTF-a

[Oleg Antipin]

Dark pion DM : WIMP vs. SIMP

Ko, Pyung-won
Korea Institute for Advanced Study, Seoul


Datum: Utorak, 09.04 2019.
Vrijeme : 15 sati c.t.
Mjesto: IRB, predavaona I krila


Sažetak

Scale invariant extension of the SM with QCD-like strongly interacting  
hidden (dark) sector is interesting, since the dimensional  
transmutation and chiral symmetry breaking in the hidden sector could  
be the origin of electroweak symmetry breaking (EWSB), and all the  
masses of the SM particles as well as dark pions and dark baryons that  
could be good cold dark matter candidates. In this talk I discuss dark  
pion DM as WIMP vs. SIMP. Ignoring the Wess-Zumino-Witten (WZW)  
interaction, I first discuss dark pion as a WIMP using two different  
approaches, the chiral perturbation theory (ChPT) and AdS/QCD. Then I  
Include the WZW interaction and discuss dark pion within SIMP  
scenario. However, the analysis based on ChPT indicates that the  
viable parameter space for SIMP seems to be outside the validity  
region of ChPT. I show that this problem can be resolved if we include  
dark vector mesons, and the SIMP idea can be realized in the dark pion  
sector.
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