Cascade events at IceCube + DeepCore as a definitive constraint on the dark matter interpretation of the PAMELA and Fermi anomalies

Sourav K. Mandal, Matthew R. Buckley, Katherine Freese, Douglas Spolyar, Hitoshi Murayama

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Dark matter decaying or annihilating into μ+μ- or τ+τ- has been proposed as an explanation for the e± anomalies reported by PAMELA and Fermi. Recent analyses show that IceCube, supplemented by DeepCore, will be able to significantly constrain the parameter space of decays to μ+μ-, and rule out decays to τ+τ- and annihilations to μ+μ- in less than five years of running. These analyses rely on measuring tracklike events in IceCube + DeepCore from down-going νμ. In this paper we show that by instead measuring cascade events, which are induced by all neutrino flavors, IceCube + DeepCore can rule out decays to μ+μ- in only three years of running, and rule out decays to τ+τ- and annihilation to μ+μ- in only one year of running. These constraints are highly robust to the choice of dark matter halo profile and independent of dark matter-nucleon crosssection.

Original languageEnglish (US)
Article number043508
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume81
Issue number4
DOIs
StatePublished - Feb 2 2010

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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