Determining the Dark Matter Relic Density in the Minimal Supergravity Stau-Neutralino Coannihilation Region at the Large Hadron Collider

Journal Article · Fri Jun 13 00:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.231802· OSTI ID:21134015

Arnowitt, Richard; Dutta, Bhaskar; Gurrola, Alfredo; Kamon, Teruki; Krislock, Abram; Toback, David ^[1]

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1. Department of Physics, Texas A and M University, College Station, Texas 77843-4242 (United States)

We examine the stau-neutralino coannihilation (CA) mechanism of the early Universe. We use the minimal supergravity (mSUGRA) model and show that from measurements at the CERN Large Hadron Collider one can predict the dark matter relic density with an uncertainty of 6% with 30 fb{sup -1} of data, which is comparable to the direct measurement by the Wilkinson Microwave Anisotropy Probe. This is done by measuring four mSUGRA parameters m{sub 0}, m{sub 1/2}, A{sub 0}, and tan{beta} without requiring direct measurements of the top squark and bottom squark masses. We also provide precision measurements of the gaugino, squark, and lighter stau masses in this CA region without assuming gaugino universality.

• OSTI ID: 21134015
• Journal Information: Physical Review Letters, Vol. 100, Issue 23; Other Information: DOI: 10.1103/PhysRevLett.100.231802; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANISOTROPY
ANNIHILATION
CERN LHC
COSMOLOGICAL MODELS
MASS
MICROWAVE RADIATION
NONLUMINOUS MATTER
SUPERGRAVITY
UNIVERSE