Implications of the latest XENON100 and cosmic ray antiproton data for isospin violating dark matter

Understand

In the scenario of isospin-violating dark matter (IVDM), the dark matter (DM) spin-independent couplings to protons and to neutrons are allowed to be different, which has been considered to relax the tensions between the results of DAMA, CoGeNT and XENON experiments.

• We explore the allowed values of DM-nucleon couplings favored and excluded by the current experiments under the assumption of IVDM.
• We find that the recently updated XENON100 result excludes the main part of the overlapping signal region between DAMA and CoGeNT.
• The mass of the IVDM is restricted to a narrow range near 7.5-8 GeV.