Speaker
Mr
Chung-Lin Shan
(Physikalisches Inst. der Univ. Bonn)
Description
Weakly interacting massive particles (WIMPs) are one of the leading candidates
for Dark Matter. Currently, the most promising method to detect many different
WIMP candidates is the direct detection of the recoil energy deposited in a low-
background laboratory detector due to elastic WIMP-nucleus scattering. So far
the usual procedure has been to predict the event rate of direct detection of
WIMPs based on some model(s) of the Galactic halo from cosmology and of
WIMPs from the elementary particle physics. This can be used to e.g. estimate
the mass of halo WIMPs only by fitting the predicted recoil spectra to future
experimental data. Now we develop a model-independent method to determine
the WIMP mass by directly using experimental data (i.e., the recoil energies) of
direct detection. This method is independent of the as yet known WIMP density
near the Earth as well as of the WIMP-nuclear cross section. Moreover,
according to our simulations, we can already get meaningful information about
the WIMP mass from less than one hundred events.
Author
Mr
Chung-Lin Shan
(Physikalisches Inst. der Univ. Bonn)
