Speaker
Prof.
David Toback
(Texas A&M University)
Description
The minimal supergravity (mSUGRA) model explains the observed dark matter content of
the universe and requires the stau-neutralino co-annihilation mechanism in the early
universe for a region of supersymmetry parameter space. This co-annihilation region
is characterized by a small mass difference (~5-15 GeV) between the lightest stau
and the lightest neutralino. An accurate measurement of the small mass difference at
a collider is crutial to confirm the co-annihilation mechanism. In this talk, I
will discuss the possible signals in the co-annihilation region and the accuracy of
measuring this small mass difference at the LHC. I will use these accurately
measured parameters to calculate the relic density and show that the accuracy of
measuring the dark matter content can be comparable to those obtained from WMAP. I
will also show that the gaugino universality condition at the GUT scale can be
checked in this coannihilation region at the LHC. This talk is based on the
following papers: Phys. Lett. B649 (2007) 73; Phys. Lett. B639 (2006) 46; paper in
preparation
Author
Prof.
David Toback
(Texas A&M University)
Co-authors
Mr
Abram Krislock
(Texas A&M University)
Mr
Adam Aurisano
(Texas A&M University)
Mr
Alfredo Gurrola
(Texas A&M University)
Prof.
Bhaskar Dutta
(Texas A&M University)
Dr
Nikolay Kolev
(University of Regina)
Mr
Paul Simeon
(Texas A&M University)
Mr
Peter Wagner
(Texas A&M University)
Prof.
Richard Arnowitt
(Texas A&M University)
Prof.
Teruki Kamon
(Texas A&M University)
