|Speaker:||Brian Feldstein (Boston U.)|
|Title:||Form Factor Dark Matter|
|Date (JST):||Thu, Aug 20, 2009, 13:30 - 14:30|
|Place:||Seminar Room at IPMU Prefab. B|
I will present a dynamical alternative to inelastic dark matter as a way of
reconciling the modulating signal at DAMA with null results at other direct detection experiments. The essential ingredient is a new form factor which introduces momentum dependence in the interaction of dark matter with nuclei. The role of the form factor is to suppress events at low momentum transfer.
I will show that a form factor approach is most likely not viable in the context of the standard halo model, however it is consistent with halo models suggested by the recent Via Lactea simulations. As an example of possible form factors, I will present a class of models where the necessary momentum dependence arises from interference of GeV mass gauge bosons coupling to nuclei. At energies relevant for direct detection experiments these models contain one or two
parameters in addition to those of a standard WIMP.