Model-independent analyses of dark-matter particle interactions
A model-independent treatment of dark-matter particle elastic scattering has been developed, yielding the most general interaction for WIMP-nucleon low-energy scattering, and the resulting amplitude has been embedded into the nucleus, taking into account the selection rules imposed by parity and time-reversal. One finds that, in contrast to the usual spin-independent/spin-dependent (SI/SD) formulation, the resulting cross section contains six independent nuclear response functions, three of which are associated with possible velocity-dependent interactions. We find that current experiments are four orders of magnitude more sensitive to derivative couplings than is apparent in the standard SI/SD treatment, which necessarily associated such interactions with cross sections proportional to v2T ~ 10⁻⁶, where vT is the WIMP velocity relative to the center of mass of the nuclear target.
- Univ. of California, Berkeley, CA (United States). Dept. of Physics; Johns Hopkins Univ., Laurel, MD (United States). Dept. of Physics.
- Stanford Univ., Stanford, CA (United States). Stanford Inst. for Theoretical Physics.
- Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Publication Date:
- Grant/Contract Number:
- SC00046548; AC02-98CH10886
- Accepted Manuscript
- Journal Name:
- Physics Procedia
- Additional Journal Information:
- Journal Volume: 61; Journal Issue: C; Journal ID: ISSN 1875-3892
- Research Org:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org:
- Country of Publication:
- United States
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS
- OSTI Identifier: