Description
Chair: Riccardo Catena
Atomic Compton scattering effect significantly contributes to low-energy electronic recoils below its k-shell energy for the direct dark matter detection. Searches on ADM models, dark photon models, leptophilic dark matter models as well as the conventional WIMPs for background understandings are vitally required to clarify the effect. We employed the relativistic impulse approximation (RIA)...
Detectors with low thresholds for electron recoil (ER) open a new window to direct searches of sub-GeV dark matter (DM) candidates. These experimental studies need important theory inputs: the DM scattering rates at detectors through some assumed DM-electron interactions. In this talk, I will present the results of our study on DM-atom scattering through DM-electron interactions at leading...
In this work we develop a formalism to describe the scattering of dark matter (DM) particles by electrons bound in crystals for general forms of non-relativistic DM-electron interactions. Our novel response to the study of DM-electron interactions allows probing DM with mass down to a fraction of an MeV in a model independent way.
Using a state of the art DFT calculation we apply our...
There is compelling cosmological and astrophysical evidence of dark matter comprising 27% of the energy budget of the Universe. However, dark matter has never been observed in direct detection experiments. The long-time favorite model of Weakly Interacting Massive Particles saw a large experimental effort with steady progress over recent decades. Since also these large-scale searches remain...
A fraction of the dark matter in the solar neighborhood might be composed of non-galactic particles with speeds larger than the escape velocity of the Milky Way. The non-galactic dark matter flux would enhance the sensitivity of direct detection experiments, due to the larger momentum transfer to the target.
In this note, we calculate the impact of the dark matter flux from the Local Group...
A new experiment collects data, since November 2019, at a depth of 210 m.w.e. in the Callio Lab [1] in the Pyhasalmi mine [2] in Finland. The setup, called NEMESIS (New EMma Experiment Searching for Indirect Signals), incorporates infrastructure from the EMMA experiment [3] with neutron and large-area plastic scintillator detectors of the MAZE system [4]. The experiment's primary aim is to...
Paleo-Detectors are natural minerals which record damage tracks from nuclear recoils over geological timescales. Minerals commonly found on Earth are as old as a billion years, and modern microscopy techniques may allow to reconstruct damage tracks with nanometer scale spatial resolution. Thus, paleo-detectors would constitute a technique to achieve keV recoil energy threshold with exposures...
Direct detection experiments are searching for rare interactions between dark matter (DM) particles and ordinary matter. If the mass of these dark particles is too low, their kinetic energy does not suffice to trigger these detectors leaving them incapable to observe DM. Processes that boost DM particles can therefore extend the observational reach of direct DM searches to lower masses. I will...
The non-relativistic effective theory of WIMP-nucleon interactions depends on 28 coupling strengths. Due to the vast parameter space of the effective theory, most direct detection experiments interpret the results of their searches assuming that only one of the coupling strengths is non-zero. On the other hand, dark matter models generically lead in the non-relativistic limit to several...
We introduce WimPyDD, a modular, object–oriented and customisable Python code that accurately predicts the expected WIMP-nucleus scattering rates in WIMP direct–detection experiments including the response of the detector. WimPyDD utilises the framework of Galilean–invariant non–relativistic effective theory, allowing to handle an arbitrary number of effective operators, and can perform the...
