Explaining the WMAP Haze with Neutralino Dark Matter

Conference · Mon Jun 01 04:00:00 EDT 2009

OSTI ID:963110

Caceres, Gabriel

It has been argued that the anomalous emission from the region around the Galactic Center observed by WMAP, known as the WMAP Haze, may be the synchrotron emission from relativistic electrons and positrons produced in dark matter annihilations. In particular, the angular distribution, spectrum, and intensity of the observed emission are consistent with the signal expected to result from a WIMP with an electroweak-scalemass and an annihilation cross section near the value predicted for a thermal relic. Here we revisit this signal within the context of supersymmetry and evaluate the parameter space of the Constrained Minimal Supersymmetric Standard Model. We find that over much of the supersymmetric parameter space the lightest neutralino is predicted to possess the properties required to generate the WMAP Haze. In particular, the focus point, A-funnel, and bulk regions typically predict a neutralino with a mass, annihilation cross section, and dominant annihilation modes that are within the range required to produce the observed features of the WMAP Haze. The stau-coannihilation region, in contrast, is disfavored as an explanation for the origin of this signal. If the WMAP Haze is indeed produced by annihilating neutralinos, prospects for future detection seem promising.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 963110
• Report Number(s): FERMILAB-CONF-09-318-A-PPD; arXiv eprint number arXiv:0906.4306
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
ANNIHILATION
ASTRONOMY
ASTROPHYSICS
COSMOLOGY
CROSS SECTIONS
DETECTION
ELECTRONS
NONLUMINOUS MATTER
ORIGIN
POSITRONS
Phenomenology-HEP
STANDARD MODEL
SUPERSYMMETRY
SYNCHROTRONS