Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-02-21
Phys.Rev.Lett.100:231802,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTex file, 4 pages, 5 eps fugures. Final version. Appear in PRL
Scientific paper
10.1103/PhysRevLett.100.231802
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 Large Hadron Collider one can predict the dark matter relic density with an uncertainty of 6% with 30 fb-1 of data, which is comparable to the direct measurement by Wilkinson Microwave Anisotropy Probe. This is done by measuring four mSUGRA parameters m0, m1/2, A0 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.
Arnowitt Richard
Dutta Bhaskar
Gurrola Alfredo
Kamon Teruki
Krislock Abram
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