Speaker
Description
The PICO-60 C$_3$F$_8$ dark matter detector is a bubble chamber located at SNOLAB, 2 km underground in Sudbury, Ontario, Canada using 52 kg of octafluoropropane (C$_3$F$_8$) as the target fluid. This experiment reached exposures of 1404 kg-day at a 2.45-keV thermodynamic threshold and 1167 kg-day at 3.29-keV. The physics program of PICO bubble chambers will be presented in this talk, including the most stringent direct-detection constraints to date on the WIMP-proton spin-dependent cross-section and leading limits on the couplings for photon-mediated interactions. Leading limits for dark matter masses between 2.7 GeV/c$^2$ and 24 GeV/c$^2$ will be presented for anapole moment, electric dipole moment, magnetic dipole moment, and millicharge. These couplings to the electromagnetic current through higher multipole interactions were studied using non-relativistic contact operators in an effective field theory framework.
