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       Superstring Amplitudes 
               Stephan Stieberger - Max Planck Institute - Munich 
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  I will introduce into the subject of string amplitudes and present many 
recent advances on tree-level open and closed superstring amplitudes
including BCJ and KLT structure, motivic and single-valued multiple zeta values. 
    
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  The plan of the course is: 
    
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  0. Motivation for string scattering amplitudes. 
  1. String amplitudes: world-sheet geometry and conformal field theory. 
  2. General properties from string world-sheet. 
  3. General structure of open superstring amplitudes. 
  4. Closed string amplitudes. 
  5. Mixed amplitudes involving both open and closed strings. 
  6. Motivic superstring amplitudes. 
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  Bibliography: 
    
  J. Polchinski, String Theory, Cambridge University Press 
  R. Blumenhagen, D. Luest, S. Theisen, Basic Concepts of String Theory, Springer 
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