Light dark matter in leptophobic Z' models

Recent experimental results in direct dark matter detection may be interpreted in terms of a dark matter particle of mass around 10 GeV=c2. We show that the required scenario can be realized with a new dark matter particle charged under an extra Abelian gauge boson Z0 that couples to quarks but not leptons. This is possible provided the Z0 gauge boson is very light, around 10-20 GeV=c2 in mass, and the gauge coupling constant is small, ἀ ~0 10-5. Such scenarios are not constrained by accelerator data.