Conveners
Parallel Session: Cosmology & Astroparticle Physics - Dark Matter
- Benedict von Harling
- Valerie Domcke
Dr
Juri Smirnov
(INFN Firenze)
28/09/2017, 14:00
Cosmology & Astroparticle Physics
I will discuss the importance of bound-state formation in the dark matter sector.
On the one hand as we have shown in a recent publication, the effect of unstable bound states is crucial for the correct computation of WIMP relic abundances. On the other hand capture photon detection from late time bound state formation will provide a new search method for heavy, multi-TeV dark matter. I will...
Mr
Maximilian Ruhdorfer
(Technische Universität München)
28/09/2017, 14:17
Cosmology & Astroparticle Physics
We consider a composite model where both the Higgs and a complex scalar χ, which is the Dark Matter (DM) candidate, arise as light pseudo Nambu-Goldstone bosons (pNGBs) from a strongly coupled sector with TeV scale confinement. The global symmetry structure is SO(7)/SO(6), and
the DM is charged under an exact U(1) DM ⊂ SO(6) that ensures its stability. Depending on whether the χ shift...
Clarissa Siqueira
(Max Planck Institut für Kernphysik)
28/09/2017, 14:34
Cosmology & Astroparticle Physics
Secluded dark matter models feature dark matter annihilations into a metastable mediator which then decays into Standard Model fermions. In this work, we test these models using current data from the Fermi-LAT (6-year observation of dwarf spheroidal galaxies) and the H.E.S.S.~(10-year observation of the Galactic center) instrument. Assuming that the metastable mediator shortly decays into...
Thomas Schwetz-Mangold
(KIT)
28/09/2017, 14:51
Cosmology & Astroparticle Physics
If the PQ phase transition happens after inflation, the axion energy density will have density fluctuations of order one. The size of the fluctuations is set by the horizon size at the QCD phase transition. Those fluctuations lead to the formation of gravitationally bound objects called miniclusters. A significant fraction of axion dark matter bound in miniclusters would have severe...
Mr
Chao Zhang
(IEXP/Univ.Hamburg)
28/09/2017, 15:08
Cosmology & Astroparticle Physics
In previous works, effective field theories (EFT) have been used to scan the relevant parameter space for single dark sector particle. We have extended upon that work to include co-annihilation as well as Sommerfeld enhancement. To this end, we have calculated solutions to the Boltzmann equation for the case of a more complex dark sector with arbitrary mass spectrum, interactions and particle...
Dr
Sofiane Boucenna
(KTH Royal Institute of Technology)
28/09/2017, 15:25
Cosmology & Astroparticle Physics
SO(10) grand unified theories can ensure the stability of new particles in terms of the gauge group structure itself, and in this respect are well suited to motivate and accommodate dark matter (DM) candidates in the form of new stable massive particles. I will give an overview of DM scenarios and related phenomenology within the framework of non-supersymmetric SO(10). In the last part of the...
