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IDM2008 - Identification of Dark Matter 2008
IDM2008 - Identification of Dark Matter 2008
18-22 August 2008 AlbaNova
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Measurement of Dark Matter Content at the LHC (15'+5')
 
Recent cosmological observations  have introduced tremendous
constraint on  supersymmetry models. The minimal supergravity
(mSUGRA) model explains the observed dark matter content of the
universe and requires stau-neutralino co-annihilation mechanism in
the early universe for a large 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 crucial to confirm the co-annihilation mechanism. 
We  show that from measurements at the LHC it is possible to confirm this 
mechanism
and using these measurements one can predict the dark matter relic 
density with an uncertainty of 6% with 30 fb-1 of data. This is possible by 
introducing measurements involving b-quark jets to determine the SUGRA 
parameters A0 and tan(beta). We measure all the mSUGRA parameters with 
high accuracy
and our methods provide precision mass measurements of the gauginos, 
squark, and
lighter stau without the mSUGRA assumption. 

This talk is based on the following papers: arXiv:0802.2968 (to appear in Phys 
Rev
Lett); Phys.Lett.B649:73-82,2007, Phys.Lett.B639:46-53,2006.
 
Id: 376
Place: AlbaNova
Room: Oskar Klein auditorium
Starting date:
18-Aug-2008   16:35
Duration: 20'
Contribution type: Talk
Primary Authors: Dr. DUTTA, Bhaskar Duta (Texas A&M University)
Presenters: Dr. DUTTA, Bhaskar Duta
Material: slide Slides
 
Included in session: Connections with accelerators
Included in track: Connections with accelerators
 

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