Cascade Events at IceCube+DeepCore as a Definitive Constraint on the Dark Matter Interpretation of the PAMELA and Fermi Anomalies
- UC, Berkeley; Tokyo U., IPMU
- Caltech
- Michigan U., MCTP
- Fermilab; UC, Santa Cruz
- UC, Berkeley; Tokyo U., IPMU; LBL, Berkeley
Dark matter decaying or annihilating into mu+mu- or tau+tau- has been proposed as an explanation for the e+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 mu+mu-, and rule out decays to tau+tau- and annihilations to mu+mu- in less than five years of running. These analyses rely on measuring track-like events in IceCube+DeepCore from down-going nu_mu. 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 mu+mu- in only three years of running, and rule out decays to tau+tau- and annihilation to mu+mu- 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 cross-section.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1864225
- Report Number(s):
- IPMU-09-0143; CALT-68-2757; FERMILAB-PUB-10-738-A; arXiv:0911.5188; oai:inspirehep.net:838228
- Journal Information:
- Phys.Rev.D, Journal Name: Phys.Rev.D Vol. 81
- Country of Publication:
- United States
- Language:
- English
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