Sneutrino dark matter and the observed anomalies in cosmic rays Academic Article uri icon

abstract

  • We revisit sneutrino dark matter in light of the recent results from the PAMELA and ATIC experiments. In the U (1)B - L extension of the minimal supersymmetric standard model the right-handed sneutrino is a natural candidate for thermal dark matter. Sneutrino annihilation at the present time can be considerably enhanced due to the exchange of the lightest field in the Higgs sector that breaks U (1)B - L. The annihilation mainly produces taus (or muons) by the virtue of B - L charges. A sneutrino mass in the 1-2 TeV range provides a good fit to the PAMELA data and a reasonable fit to the ATIC data. Within this mass range the sneutrino-nucleon elastic scattering cross section is 10- 11 - 10- 9 pb, which might be probed by upcoming and future direct detection experiments. In addition, if (at least) one of the neutrinos is dominantly a Dirac fermion, the sneutrino can provide a unified picture of dark matter and inflation. © 2009 Elsevier B.V. All rights reserved.

published proceedings

  • Physics Letters B

author list (cited authors)

  • Allahverdi, R., Dutta, B., Richardson-McDaniel, K., & Santoso, Y

citation count

  • 28

complete list of authors

  • Allahverdi, Rouzbeh||Dutta, Bhaskar||Richardson-McDaniel, Katherine||Santoso, Yudi

publication date

  • June 2009