Conveners
M3-3 Cosmic Messengers (PPD/DNP/DTP) | Messagers cosmiques (PPD/DPN/DPT)
- Andreas Warburton (McGill University)
Dark matter direct detection experiments have been traditionally reporting their results in terms of limits on the spin-independent and spin-dependent cross sections. However, these two types of interactions are only a subset of possible interactions between WIMPs and nucleons. The full set of couplings can be derived in the effective field theory (EFT) framework. In this approach “new"...
NEWS-G is a dark matter direct-detection experiment using spherical proportional counters with light noble gases in the search for low-mass WIMPs. We report on the final results of the analysis of 42 days of WIMP-search data taken at the Laboratoire Souterrain de Modane using a 60 cm diameter sphere filled with a mixture of Ne + CH4 (0.7%) at 3.1 bars. Competitive constraints are set on the...
During its first physics run the PICO-60 C$_3$F$_8$ bubble chamber was operated at a thermodynamic energy threshold of 3.3 keV, acquiring a background-free WIMP-search exposure of 1167 kg-days.
Following the acquisition of this dataset, the temperature and pressure of the superheated C$_3$F$_8$ target were altered to lower the energy threshold across a range of values from 2.5 keV to 1.8 keV....
Thermal relic dark matter models predict dark matter particles with masses of ~10 keV/c$^2$ to 10 TeV/c$^2$. As existing experiments are insensitive to the lowest masses in this range, new technologies for light dark matter searches are being pursued. The SuperCDMS, NEWS, DAMIC, and CRESST experiments are beginning to exploring the light dark matter regime while pushing towards the physical...
Recent results have highlighted that local measurement of a quantum field can reveal information about the global structure of spacetime. We therefore investigate the RP3 geon, which is identical to the Schwarzschild black hole except for a topological identification behind the event horizon. In order to model local measurements, we use the Unruh-DeWitt particle detector model. We find that a...
Single photon absorption is the process when an atom absorbs a photon whose energy is equal to the atoms next closest energy level. Two photon absorption however is when an atom absorbs any two photons whose energy sums up to the transition energy. The study of two photon absorption has multiple applications in several fields of physics. One area which has not been completely explored is its...
