[seminar] Ko, Pyung-won, 09.04. (utorak) 15h (c.t.), seminar ZTF-a
Oleg Antipin
Oleg.Antipin at irb.hr
Thu Apr 4 12:22:18 CEST 2019
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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