Dr. Riccardo Catena (Chalmers University of Technology)
Direct detection (DD) experiments and Neutrino telescopes (NT) will play a pivotal role in shedding light on the nature of dark matter during the next decade. An effective theory approach is a solid strategy to interpret DD experiments and NT observations when the momentum transferred in the dark matter scattering by nuclei is small compared to the mass of the particle mediating the...
60. How to calculate direct detection exclusion limits that are consistent with gamma rays from WIMP annihilation in the Milky Way halo
Prof. Anne Green (University of Nottingham)
When comparing constraints on the WIMP properties from direct and indirect detection experiments it is crucial that the assumptions made about the dark matter (DM) distribution are realistic and consistent. If the Fermi-LAT Galactic centre GeV gamma-ray excess was due to WIMP annihilation, its morphology would be incompatible with the Standard Halo Model that is usually used to interpret data...
Dr. Bradley Kavanagh (LPTHE - Paris)
Direct detection experiments aim to detect the interaction of Galactic Dark Matter (DM) with terrestrial nuclei. But many of these DM particles will pass through the Earth before reaching the detector. During this transit, they may interact and scatter, altering their distribution at the Earth's surface. I will sketch the first fully self-consistent calculation of this ‘Earth-Shadowing’...
Prof. Chung-Lin Shan (Xinjiang Astronomical Observatory, Chinese Academy of Sciences)
In this talk, I show at first the effect of a non-negligible threshold energy on the reconstruction of the one-dimensional velocity distribution of Galactic WIMP Dark Matter by using our model-independent data analysis procedure. Then I will discuss the modification of our expressions for correcting this effect for light WIMPs and present some numerical results of our Monte-Carlo simulations.
Dr. Andrzej Hryczuk (University of Oslo)
In this talk we will discuss the relic density and indirect signals from CRs and diffuse gamma rays of TeV-scale neutralino dark matter in the pMSSM. A recently developed framework enables us to calculate the Sommerfeld-enhanced relic density in general MSSM scenarios, properly treating mixed states and multiple co-annihilating channels as well as including off-diagonal contributions. We will...
Michael Schmidt (The University of Sydney)
We propose a new approach to the LHC dark matter search analysis within the effective field theory (EFT) framework by utilising the K-matrix unitarisation formalism. This approach provides a reasonable estimate of the dark matter production cross section at high energies and hence allows to put reliable bounds on the cut-off scale of relevant operators without running into the problem of...
Dr. Arghya Choudhury (University of Sheffield)
We construct models of dark matter with suppressed spin-independent scattering cross section utilizing the existing simplified model framework. Even simple combinations of simplified models can exhibit interference effects that cause the tree level contribution to the scattering cross section to vanish, thus demonstrating that direct detection limits on simplified models are not robust...
Pat Scott (Imperial College)
I will describe the latest technological advances in bringing together complementary probes of dark matter in wholistic, statistically consistent, large-scale global fits to dark matter theories with the GAMBIT framework. I will then detail the latest combined impacts of all searches on popular theories for dark matter including singlet models interacting with the Standard Model through the...
Dr. Yi Cai (The University of Melbourne)
We consider the indirect detection signals for a self-consistent hidden U (1) sector, containing a fermionic dark matter candidate, dark gauge boson and a Dark Higgs. The presence of an additional scalar, the Dark Higgs, provides a mass generation mechanism for the dark sector particles and is required to avoid unitarity violation at high energies. It also opens up a new process that can...
Mr. James McKay (Imperial College London)
Minimal dark matter with a fermionic electroweak quintuplet is a phenomenologically valid dark matter model. I will discuss constraints coming from the renormalisation of this theory, namely vacuum stability, the location of the Landau pole, and the intra-multiplet mass splittings. In particular, I will demonstrate some subtleties and pitfalls in the phenomenologically crucial problem of...
Sebastian Liem (Grappa, University of Amsterdam)
An effective field theory (EFT) approach allows us to describe WIMP interactions as point-like, regardless of the specific fundamental theory at higher energies. We consider simultaneously all phenomenologically relevant EFT operators for scalar DM and perform a global statistical analysis. We identify the most probable regions of the theory parameter space compatible with experimental...
23. Bayesian study of cosmic ray propagation: evidence against homogeneous propagation and implications for indirect detection of dark matter
Dr. Aaron Vincent (IPPP Durham)
I will present the results of Galbayes, the largest ever fully-numerical neural-network-assisted study of the cosmic ray (CR) propagation parameters. We show that in the most commonly-used diffusion-reacceleration model there is significant tension between the propagation parameters that govern protons and antiprotons, vs the light elements including B/C, which are customarily used to...
Mr. Tiit Sepp (Tartu Observatory)
We present the results of $N$-body/smoothed particle hydrodynamics simulations of galaxy cluster collisions with a two component model of dark matter, which is assumed to consist of a predominant non-interacting dark matter component and a 20\% mass fraction of dark plasma. Dark plasma is an intriguing form of interacting dark matter with an effective fluid-like behavior, which is well...
Dr. Robert Foot (COEPP, School of Physics, University of Melbourne)
Dark matter might exist in the Milky Way as a dark plasma. Such dark matter arises in models where dark matter originates from a hidden sector featuring a massless 'dark photon', including mirror dark matter. In such a scenario, the implications for direct detection experiments are very different from the more commonly studied case of WIMP dark matter. In particular electron recoils can be the...
Dr. Giorgio Busoni (The University of Melbourne)
Up to a few year ago the standard paradigm for Dark Matter search at LHC was the use of Effective Field Theories. It was pointed out, however, that the validity of the EFT approach might be questionable at LHC. Because of this, recently the both theory and experimental communities switched to the use of "Simplified Models", that are models that contain only renormalizable interactions. To keep...