CMSSM Spectroscopy in light of PAMELA and ATIC

TL;DR

This paper explores how neutralinos within the CMSSM could explain recent cosmic ray observations from PAMELA and ATIC, analyzing the implications for particle spectroscopy and neutrino flux predictions.

Contribution

It investigates the parameter space of CMSSM neutralinos to account for cosmic ray data and provides benchmark points and neutrino flux estimates for these scenarios.

Findings

Neutralino mass around 700 GeV - 2 TeV can explain both PAMELA and ATIC data with new physics.

Light neutralinos (~100-300 GeV) can only explain either PAMELA or ATIC, not both.

Predicted neutrino fluxes vary significantly between annihilation and decay scenarios.

Abstract

Dark matter neutralinos in the constrained minimal supersymmetric model (CMSSM) may account for the recent cosmic ray electron and positron observations reported by the PAMELA and ATIC experiments either through self annihilation or via decay. However, to achieve this, both scenarios require new physics beyond the 'standard' CMSSM, and a unified explanation of the two experiments suggests a neutralino mass of order 700 GeV - 2 TeV. A relatively light neutralino with mass around 100 GeV (300 GeV) can accomodate the PAMELA but not the ATIC observations based on a model of annihilating (decaying) neutralinos. We study the implications of these scenarios for Higgs and sparticle spectroscopy in the CMSSM and highlight some benchmark points. An estimate of neutrino flux expected from the annihilating and decaying neutralino scenarios is provided.