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HK: Fachverband Physik der Hadronen und Kerne

HK 43: Astroteilchenphysik

HK 43.3: Vortrag

Dienstag, 5. März 2013, 17:45–18:00, HSZ-401

Large-scale nuclear structure calculation of spin-dependent WIMP scattering off nuclei with chiral currents^⋆ — •Philipp Klos¹, Javier Menéndez^1,2, and Achim Schwenk^1,2 — ¹Institut für Kernphysik, Technische Universität Darmstadt — ²ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH

Chiral effective field theory (EFT) provides a systematic expansion for the coupling of WIMPs to nucleons at the momentum transfers relevant to direct cold dark matter detection. We derive the currents for spin-dependent WIMP scattering off nuclei at the one-body level and include the leading long-range two-body currents, which are predicted in chiral EFT, as well as the formalism necessary to describe WIMP-nucleus scattering at the most general level including both elastic and inelastic interactions. As an application, we calculate the structure factor for elastic, spin-dependent WIMP scattering off the experimentally relevant isotopes ^129,131Xe, ¹²⁷I, ⁷³Ge, ¹⁹F, ²³Na ,²⁷Al and ²⁹Si nuclei, using nuclear interactions that have been developed to study nuclear structure. We provide theoretical error bands due to the nuclear uncertainties of WIMP currents in nuclei.

^⋆This work was supported in part by the DFG through grant SFB 634, the Helmholtz Alliance HA216/EMMI, and a BMBF ARCHES Award.