Implementation of a W &rarr &tau + &nu analysis class

In this summerstudent project an analysis class for the HepMCAnalysis Tool was developed and implemented. The class will evaluate the physics process p + p &rarr W &rarr &tau + &nu on generator level by histogramming the distributions of significant observables. This process plays an important role in the background of Higgs and supersymmetric particle decays into &tau -leptons.

All the analyses are based on the HepMCAnalysis tool. Here is a documentation of the used release 3.2.

The analysis has been applied to the following Monte Carlo generators:

Validation for Pythia6 6.423.2 in reference to 6.421.2:

Pythia6: analysis W tau nu plots

Validation for Pythia8 140 in reference to 135:

Pythia8: analysis W tau nu plots

Validation for Herwig 6.510.3 in reference to 6.510.2:

Herwig: analysis W tau nu plots

Validation for Herwig++ 2.4.2 in reference to 2.4.1:

Herwig++: analysis W tau nu plots

The results of the analysis and important physical observables are discussed for Pythia6: results.

Special characteristics of the Monte Carlo generators are shown: results.

The produced histograms are also saved in a .root file. You can find them here.