Conveners
Particle Phenomenology session on Zoom and in Main Auditorium.
- Susanne Westhoff
Dr
Christoph Borschensky
(Eberhard Karls Universität Tübingen)
25/09/2020, 15:45
Particle Phenomenology
In my talk, I will present a calculation of the next-to-leading order QCD corrections for the scattering of Dark Matter particles off nucleons in the framework of simplified models with $s$- and $t$-channel mediators. These results are matched to the Wilson coefficients and operators of an effective field theory that is generally used for the presentation of experimental results on...
Ms
Ghazal Ghafari
(Bonn University)
25/09/2020, 16:00
Particle Phenomenology
We postulate the WIMP neutralino Dark Matter's interaction with ordinary matter as scattering from the direct detection experiments' nucleon target. Recently, one of the most sensitive direct detection experiments XENON1T submitted an upper bound on the WIMP-Nucleon Spin-Independent elastic cross-section $ \sigma_{SI} $ at $ 4.1 \times 10^{-47} GeV^2 $ for a mass of $ 30 \frac{GeV}{c^2} $. We...
Dr
Elisa Todarello
(KIT)
25/09/2020, 16:15
Particle Phenomenology
Axion--photon interactions can lead to an enhancement of the electromagnetic field by parametric resonance in the presence of a cold axion background, for modes with a frequency close to half the axion mass. In this paper, we study the role of the axion momentum dispersion as well as the effects of a background gravitational potential, which can detune the resonance due to gravitational...
Mr
Maximilian Ruhdorfer
(Technical University of Munich)
25/09/2020, 16:30
Particle Phenomenology
We examine the contribution of small instantons to the axion mass in various UV completions of QCD. We show that the reason behind the potential dominance of such contributions is the non-trivial embedding of QCD into the UV theory. The effects from instantons in the partially broken gauge group appear as “fractional instanton” corrections in the effective theory. These will exhibit unusual...
