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 ${\sigma }_{\mathrm{SI}}\sim 10^{-3\pm 1}$ pb can be easily accommodated by leptophobic dark matter (${\chi }_B$) with correct relic density, if the $U(1{)}_B$ gauge boson mass is around $2m_{{\chi }_B}$. 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.

arXiv comment5 pages, 2 figure; to be published in Phys. Lett. B

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