title: Excluding light asymmetric bosonic dark matter.
abstract: We argue that current neutron star observations exclude asymmetric bosonic noninteracting dark matter in the range from 2 keV to 16 GeV, including the 5-15 GeV range favored by DAMA and CoGeNT. If bosonic weakly interacting massive particles (WIMPs) are composite of fermions, the same limits apply provided the compositeness scale is higher than ∼10¹²  GeV (for WIMP mass ∼1  GeV). In the case of repulsive self-interactions, we exclude the large range of WIMP masses and interaction cross sections which complements the constraints imposed by observations of the Bullet Cluster.
authors.affiliation: CP3-Origins, University of Southern Denmark, Campusvej 55, Odense 5230, Denmark. kouvaris@cp3.sdu.dk
authors.forename: Chris
authors.initials: C
authors.lastname: Kouvaris
authors.forename: Peter
authors.initials: P
authors.lastname: Tinyakov