Supersymmetric U(1)B x U(1)L model with leptophilic and leptophobic cold dark matters

Abstract

We consider a supersymmetric model with extra $U(1{)}_B\times U(1{)}_L$ gauge symmetry that are broken spontaneously. Salient features of this model are that there are three different types of cold dark matter (CDM) candidates, and neutral scalar sector has a rich structure. Light CDM with $\ddot{I}{ƒ}_{\mathrm{SI}}\sim 10^{-3\pm 1}$ pb can be easily accommodated by leptophobic dark matter ($\ddot{I}{‡}_B$) with correct relic density, if the $U(1{)}_B$ gauge boson mass is around $2m_{\ddot{I}{‡}_B}$. Also the PAMELA and Fermi/LAT data can be fit by leptophilic CDM with mass $\sim 1$ TeV. There could be interesting signatures of new fermions and new gauge bosons at the LHC.

5 pages, 2 figure; to be published in Phys. Lett. B