SupersymmetricB−Ldark matter model and the observed anomalies in the cosmic rays
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We propose a simple model of supersymmetric dark matter that can explain recent results from PAMELA and ATIC experiments. It is based on a U(1)B-L extension of the minimal supersymmetric standard model. The dark matter particle is a linear combination of the U(1)B-L gaugino and Higgsino partners of Higgs fields that break the B-L around 1 TeV. The dominant mode of dark matter annihilation is to the lightest of the new Higgs fields, which has a mass in the GeV range, and its subsequent decay mainly produces taus or muons by the virtue of B-L charges. This light Higgs also results in Sommerfeld enhancement of the dark matter annihilation cross section, which can be 103. For a dark matter mass in the 1-2 TeV range, the model provides a good fit to the PAMELA data and a reasonable fit to the ATIC data. We also briefly discuss the prospects of this model for direct detection experiments and the LHC. © 2009 The American Physical Society.
author list (cited authors)
Allahverdi, R., Dutta, B., Richardson-McDaniel, K., & Santoso, Y
complete list of authors
Allahverdi, Rouzbeh||Dutta, Bhaskar||Richardson-McDaniel, Katherine||Santoso, Yudi