Interpreting the bounds on Solar Dark Matter induced muons at Super-Kamiokande in the light of CDMS results

TL;DR

This paper analyzes how recent CDMS limits on dark matter interactions impact Super-Kamiokande's bounds on muons from solar WIMP annihilation, highlighting potential for rate enhancement and implications for PAMELA data.

Contribution

It provides a reinterpretation of Super-Kamiokande bounds using CDMS limits, exploring the possibility of rate boosts and their dependence on WIMP properties.

Findings

Super-Kamiokande muon rate predictions are below current upper limits.

Potential exists for boosting predicted muon rates using CDMS constraints.

Boost factors depend on WIMP mass and annihilation channels.

Abstract

We consider the recent limits on dark matter - nucleon elastic scattering cross section from the analysis of CDMS II collaboration using the two signal events observed in CDMS experiment. With these limits we try to interpret the Super-Kamiokande (SK) bounds on the detection rates of up-going muons induced by the neutrinos that are produced in the sun from the decay of annihilation products of dark matter (WIMPs) captured in the solar core. Calculated rates of up-going muons for different annihilation channels at SK using CDMS bounds are found to be orders below the predicted upper limits of such up-going muon rates at SK. Thus there exists room for enhancement (boost) of the calculated rates using CDMS limits for interpreting SK bounds. Such a feature is expected to represent the PAMELA data with the current CDMS limits. We also show the dependence of such a possible enhancement factor (boost) on WIMP mass for different WIMP annihilation channels.