Planck 2018&nbsp;<br /> <h2>From the Planck Scale to the Electroweak Scale</h2>

Session

Parallel Session on DM

24 May 2018, 14:00

Bonn

105. Dark matter direct detection at one loop

Michael Schmidt

24/05/2018, 14:00

The strong direct detection limits indicate that dark matter may not directly couple to quarks and consequently direct detection only occur at loop level. We study direct detection in the prototype example of an electroweak singlet dark matter fermion coupled to an extended dark sector composed of a new fermion and a new scalar. We also discuss the cases if either the new fermion or scalar is...

106. Dark matter direct detection with pseudoscalar mediators

Stefan Vogl

24/05/2018, 14:20

Due to its highly suppressed cross section (fermionic) dark matter interacting with the Standard Model via pseudoscalar mediators is expected to be essentially unobservable in direct detection experiments. We consider both a simplified model and a more realistic model based on an extended two Higgs doublet model and compute the leading one-loop contribution to the effective dark matter-...

107. Self-interacting dark matter with a stable vector mediator

Mr Sebastian Wild (TU München)

24/05/2018, 14:40

Self-interactions of dark matter induced by a MeV-scale vector mediator $Z_\text{D}$ can naturally cure some shortcomings of the standard cold dark matter paradigm at small scales. However, if the vector particle decays into Standard Model states, such a scenario is robustly excluded by constraints from energy injection during CMB. We study to what extent this conclusion can be circumvented if...

108. Residual annihilations of asymmetric DM

Dr Iason Baldes (DESY)

24/05/2018, 15:00

Dark matter coupled to light mediators has been invoked to resolve the putative discrepancies between collisionless cold DM and galactic structure observations. However, $\gamma$-ray searches and the CMB strongly constrain such scenarios. To ease the tension, we consider asymmetric DM. We show that, contrary to the common lore, detectable annihilations occur even for large asymmetries, and...

109. Dark Matter from the Top

Simon Kast

24/05/2018, 15:20

We study simplified models of top-flavoured dark matter in the framework of Dark Minimal Flavour Violation. In this setup the coupling of the dark matter flavour triplet to SM quark triplets constitutes the only new source of flavour and CP violation. The parameter space of the model is restricted by LHC searches with missing energy final states, by neutral meson mixing data, by the observed...