Systematic improvement of QCD parton showers
  In this contribution, we will give a brief overview of the progress that has been achieved in the field of combining matrix elements and parton showers. We exemplify this by focusing on the case of electron--positron collisions and by reporting on recent developments as accomplished within the Sherpa event generation framework. 
Jan Winter, Stefan Hoeche, Hendrik Hoeth, Frank Krauss, Marek   Schonherr, Steffen Schumann, Frank Siegert, Korinna Zapp
hep-ph