Dr
Jan Hajer
(UCLouvain)
25/09/2019, 14:00
Cosmology & Astroparticle Physics
Extensions to the SM featuring a low-scale seesaw can be used to to explain the observation of neutrino oscillations, baryogenesis and dark matter. I present the potential to search for right-handed neutrinos using current experiments. I compare the reach of the main detectors at the LHC when a displaced vertex signature in proton collisions is used. Additionally, I show the potential to...
Mr
Mathias Becker
(TU Dortmund)
25/09/2019, 14:20
Cosmology & Astroparticle Physics
We investigate a model of neutrino portal dark matter where a right-handed neutrino both generates the observed neutrino masses and mediates between the SM and a dark sector, consisting of a fermion and a boson.
We explore the parametrics and different constraints on the neutrino portal to dark matter. In contrast to earlier work, we focus on regions of the parameter space where DM is...
Mr
Sarif Khan
(Goettingen University)
25/09/2019, 14:35
Cosmology & Astroparticle Physics
In this work, we explain three beyond standard model (BSM) phenomena, namely neutrino masses, the baryon asymmetry
of the Universe and Dark Matter, within a single model and in each explanation the right handed (RH) neutrinos play the
prime role. Indeed by just introducing two RH neutrinos we can generate the neutrino masses by the Type-I seesaw
mechanism. The baryon asymmetry of the...
Sandeepan Gupta
(Durham)
25/09/2019, 14:50
Cosmology & Astroparticle Physics
We present a unified relaxion solution to the five major
outstanding issues in particle physics: the hierarchy problem, dark
matter, matter-antimatter asymmetry, neutrino masses and the strong CP
problem. The only additional field content in our construction with
respect to standard relaxion models is an up-type vector-like fermion
pair and three right-handed neutrinos charged under the...
Mr
Philipp Klose
(Université Catholique de Louvain)
25/09/2019, 15:10
Cosmology & Astroparticle Physics
For leptogenesis with heavy sterile neutrinos above the Casus-Ibarra bound, asymmetries produced by relativistic sterile neutrinos at early times can be relevant in the case of weak washout or if the asymmetry is partly protected from washout by being transferred to partially equilibrated spectator fields. We thus study the relevance of relativistic effects for leptogenesis in a minimal seesaw...
Valentina De Romeri
(IFIC (CSIC-Univ. Valencia))
25/09/2019, 15:20
Cosmology & Astroparticle Physics
Assuming light vector mediators, we discuss the effects of CP violation on the coherent elastic neutrino-nucleus scattering (CEvNS) process in the COHERENT sodium-iodine, liquid argon and germanium detectors. We show that in some regions of the parameter space, the presence of a dip in the event rate spectrum can be used to constraint CP violating effects. In other regions, we find that CP...
Ms
Anja Brenner
(Technische Universität München)
25/09/2019, 15:40
Cosmology & Astroparticle Physics
Dark matter particles from the galactic halo can be captured by the sun and can then annihilate into Standard Model particles which makes the sun a source of GeV neutrinos. One goal of the IceCube Neutrino Observatory (IceCube) is to detect these neutrinos. In this work, we present the constraints on the DM-nucleon interactions which we obtain from 3-year IceCube observations of the Sun.
Mr
Henrique Rubira
(DESY)
25/09/2019, 15:50
Cosmology & Astroparticle Physics
We study the power spectrum of dark matter density fluctuations in the framework of the Effective Field Theory of Large Scale Structures (EFTofLSS) up to three loop orders. In principle, several counter-terms may be needed to handle the short-distance sensitivity in perturbation theory. However, we show that a small number of extra coefficients are sufficient to match numerical simulations...
