Out-going Muon Flux from Neutralino Annihilation in the Sun and the Earth in Supergravity Unification

TL;DR

This paper predicts muon fluxes resulting from neutralino annihilation in the Sun and Earth within supergravity models, analyzing uncertainties and comparing with experimental limits to assess detection prospects.

Contribution

It provides detailed predictions of muon fluxes from neutralino annihilation in the Sun and Earth, considering uncertainties and their implications for detection.

Findings

Earth flux larger at low fine tuning

Sun flux larger at high fine tuning

Combined fluxes compete with direct detection limits

Abstract

Predictions for the out-going muon fluxes from the annihilation of neutralinos in the center of the Sun and the Earth in supergravity unification are given. Effects of uncertainties of the input data are analysed. It is shown that the out-going muon flux measurements from the Sun and the Earth are complementary, with the Earth providing a larger flux for low values of fine tuning and the Sun providing a larger flux for high values of fine tuning, and that only a combination of the two can compete favorably with the direct detection measurements. The predictions are compared with the recent limits from BAIKAL NT-96, MACRO, and BAKSAN.