Seminare SS 19


Di. 02.04.2019 16:30 (28B110)

Stefano Gariazzo (IFIC Valencia)

Relic neutrinos and the PTOLEMY project

The Cosmic Neutrino Background (CNB) is a prediction of the standard cosmological model, but it has been never observed directly. Several methods of direct detection for the CNB have been proposed in the past and the most promising one is currently adopted to develop the PTOLEMY proposal. I will review some theoretical aspects of the CNB, including the calculation of the local density of relic neutrinos in the Milky Way, some proposed detection techniques and finally discuss the specific case of PTOLEMY, mostly from the point of view of perspectives in neutrino physics.


Di. 21.05.2019 16:30 (28B110)

Yoann Genolini (ULB, Brussels)

DM and compact objects

Due to their extreme density and low temperature, neutron stars (NS) are efficient probes to unveil interactions between standard model and dark matter (DM) particles. From elastic scatterings on NS material, DM can get gravitationally trapped by the star. The cooling of DM through further collisions may lead to the formation of a dense core which could collapse into a black hole, thus destroying the whole NS. I will show that from the observation of old NS, such a scenario leads to very stringent constraints on the parameter space of asymmetric DM, and I will detail the novelties we have introduced.


Di. 28.05.2019 16:30 (28B110)

Andreas Meyer (DESY)

Physics at the HL-LHC

The High-Luminosity LHC (HL-LHC) is going to start operation in 2026. Upgrades of the experiments comprise substantially improved detectors with larger acceptance, better triggers, and enhanced background suppression. Until the end of the 2030s, an integrated luminosity of 3000 fb-1 of pp data will be recorded. Based on the recent new and precise results of LHC Run-2, the expectations for the physics yield at the HL-LHC have been updated. The report of the "Workshop on the Physics at the HL-LHC and Perspectives for the HE-LHC”,  input to the European Particle Physics Strategy Update 2018-2020, covers all aspects of HL-LHC physics. In my talk, I am presenting a selection of highlights.


Di. 18.06.2019 16:30 (28B110)

Belina von Krosigk (TRIUMF, Vancouver)

Searches for Dark Sector Particles with SuperCDMS SNOLAB

The Super Cryogenic Dark Matter Search (SuperCDMS) is a direct Dark Matter search experiment designed to observe nuclear recoils induced by WIMPs. However, it is also sensitive to Dark Matter particle candidates beyond the standard WIMP paradigm, which could create electron recoil signals in the cryogenic silicon and germanium detectors. The pool of candidates is rich and includes Dark Photons, ALPs (axion-like particles) and LDM (light Dark Matter) particles. Lacking knowledge of the particles that constitute the dark sector of the Universe it is essential to make the search for them as broad as possible. This talk will give an overview of the versatile dark sector particle search strategies at the upcoming SuperCDMS SNOLAB experiment and will highlight first results with R&D devices as well as the expected science reach of selected searches.


Di. 25.06.2019 16:30 (28B110)

Dietrich Bödeker (Uni Bielefeld)


I present a brief introduction to finite temperature quantum field theory, in particular for Quantum Chromodynamics (QCD). Applications in cosmology, like the effect on gravitational waves, the production of dark matter and of the matter-antimatter asymmetry are discussed.