Speaker
Elena Filandri
(U)
Description
In this work we studied the deuteron-WIMP scattering, assuming the latter to be a Dirac particle. In order to describe the WIMP-nucleon interaction we used the $\chi$EFT framework, an EFT based on chiral symmetry which has pions and nucleons as effective degrees of
freedom.
The Lagrangian interaction terms have been obtained by placing the WIMP as an external source in the QCD Lagrangian. Therefore, considering only interactions invariant under parity, charge conjugation and time-reversal symmetries, we have examined five WIMP and
quarks interaction types (scalar, pseudoscalar, vector, axial and tensor).
We have applied this program to study the nuclear response to DM scattering up to second chiral order and finally to calculate the rate of WIMP scattering in a target of liquid deuterium. With respect to other calculations in the literature, we have included systematically the contributions of two-body currents and treated quark-WIMP vertex of tensor type. We plan to apply this formalism to study also helium-DM scattering since liquid helium has been proposed as a possible target for a new direct detection experiment.
Primary author
Elena Filandri
(U)
Co-author
Prof.
Michele Viviani
(University of Pisa & INFN)
