Speaker
Dr
Tania Robens
(RWTH Aachen, Institut fuer Theoretische Physik E)
Description
In the Chargino-/ Neutralinosector of the MSSM, the electroweak SUSY parameters can
be determined by a small number of measurements of masses and cross sections. NLO
corrections to these observables are in the percent regime, thereby matching the size
of experimental fitting accuracies for joint LHC/ ILC analyses. We therefore include
the NLO result for Chargino at the ILC production in the Monte Carlo Event Generator
Whizard. In a fixed NLO approach, the event generation suffers from negatve event
weights in certain points of parameter space. Therefore, we in addition present an
alternative way to include photonic corrections which avoids negative weights by
resumming leading logarithmic contributions from photon emission to all orders and
automatically accounts for additional higher order contributions. This method is
process-indepenent can be applied to the inclusion of any other 2->2 process at NLO.
For Chargino pair-production, we present cross sections as well as differential event
distributions for both methods.
Authors
Dr
Juergen Reuter
(Universitaet Freiburg)
Dr
Tania Robens
(RWTH Aachen, Institut fuer Theoretische Physik E)
Prof.
Wolfgang Kilian
(Universitaet Siegen)