Speaker
Description
Weakly-Interacting-Massive-Particles (WIMPs) are a large class of viable dark matter candidates. We employ heavy particle effective field theory to compute general heavy electroweak multiplets and nucleon elastic scattering up to heavy mass $1/M$ order.
For certain electroweak multiplets, leading order effective theory calculation shows a generic amplitude-level cancellation that yields a severe suppression of the cross section for WIMP-nucleon scattering,
leaving them robust candidates surviving current direct detection experimental sensitivities.
We here perform computation for arbitrary electroweak representations for
all spin-0, spin-1/2, spin-1 and spin-3/2 heavy particles, combining contributions from perturbative QCD and nuclear effects
by state-of-the-art chiral effective theory calculations, and obtain a comprehensive and model-independent WIMP-nucleon benchmark cross section and
WIMP-nucleus direct detection event rate.
