

   Request for a DESY Summer Student in 2012
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   Name :  Dr. Janet Dietrich      email :   janet.dietrich@desy.de   
  
   Tel  :   5379                   Room :3/34
 
   DESY-Group/Experiment : ATLAS

 
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 Short description of the project the student should work on  :

One of the main goals of the ATLAS experiment are searches for new physics. Supersymmetry (SUSY) is one of the most compelling theories to describe physics 
beyond the Standard Model. If supersymmetric particles are present at the TeV-scale, the production of squarks and gluinos, superpartners of quarks 
and gluons, constitutes one of the most promising channels for a SUSY discovery at the Large Hadron Collider (LHC).
The LHC has started the operation of proton-proton collision at a center-of-mass energy of 7 TeV in 2010 and already accumulated
5 fb-1 of data by the end of 2011. This year the LHC will operate at 8 TeV and collect even more data than the years before and 
searches for new physics with leptons and large missing transverse energy final states will become very sensitive. 

Immersed in the group effort, the student will participate in the preparation of the ATLAS SUSY searches strategy for the 2012 data and will work on 
experimental methods to optimise the SUSY analyses for decay signatures with final states with two or more leptons. One of the main goals of his/her work will
be to improve the existing methods and to increase the signal/background ratio as well as to reduce important systematics.
The student will develop a search strategy and test this for different supersymmetric models. It is also possible to 
study different MC generators and to determine systematic uncertainties for the different SUSY analyses.

His/her contribution is expected to provide relevant inputs to the group strategy. The work will also allow the student to gain knowledge over
the typical software tools of the ATLAS collaboration and provide him/her insight of the current efforts done in the SUSY searches at
the LHC. If the students is interested, he/she can present his/her results in a ATLAS SUSY meeting. 




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   Physics / Computing/ Engineering  Content of the project :

70 % / 30 % / 0 %


During his/her stay the summer student will deepen his/her understanding of the Standard
Model (SM) of particle physcics as well as physics beyond the SM - especially Supersymmetry (SUSY).
He/she will work on the improvement of the SUSY searches by looking into ways of reducing important Standard Model backgrounds (cut optimization) and
inventing new analyses cuts.
The developed strategy should be tested for different supersymmetric models and the student will 
analyse latest ATLAS data taken last year (2011) and beginning this year (> 5 fb-1).
It is also possible to study different MC generators and to determine systematic
uncertainties for the different SUSY analyses.


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  Special Qualifications expected from the student ( Computing,...) :
 
Some familiarity with Object-Oriented programming (C++, Python and the ROOT analysis framework in particular) would be very helpful, 
but are not a necessity. 

 
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  Other remarks :  



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   Supervisor(s) during the project (17/07/12 - 6/09/12) :
 
  
   Name:   Dr. Janet Dietrich            Tel:  5379     email :






