- Dec. 5, 2017, 2:00 pm
- Wilson Hall, The Theory Room (WH3NW)
- Yu-Dai Tsai, Cornell
- InSPIRE profile
We present a novel dark matter (DM) candidate, Elastically Decoupling Relic (ELDER), in which the DM current-day abundance is dominantly determined via the elastic decoupling between standard model particles and DM, rather than a usual DM freeze-out. ELDER has a distinctive thermal history and new phenomenological implications in comparison to the CDM/WIMP scenarios. It provides solid predictions for both dark photon searches and next-generation direct-detection experiments, including the SENSEI experiment at Fermilab.
In the second part of the talk, I will talk briefly about the gravitational-wave (mergers), optical (quiet kilonovae), and radio signatures of DM-induced neutron star (NS) Implosions. The astrophysical signatures are ways to go 4 to 10 orders of magnitude beyond the DM direct-detection limits, demonstrated using superheavy asymmetric DM as an example. The recently detected NS merger event, GW170817, provided us with the first robust data point for the statistical test.
The talk is based on Phys. Rev. Lett. 116, 221302 (arXiv:1512.04545), JHEP 08:078, 2017 (arXiv:1706.05381), and arXiv:1706.00001.