\BOOKMARK [2][]{Outline0.2}{Chopping technique}{} \BOOKMARK [3][]{Outline0.2.1.3}{General idea}{Outline0.2} \BOOKMARK [3][]{Outline0.2.2.4}{Performance gain}{Outline0.2} \BOOKMARK [2][]{Outline0.3}{Proposal of new variables}{} \BOOKMARK [3][]{Outline0.3.1.10}{MC/DATA comparison}{Outline0.3} \BOOKMARK [3][]{Outline0.3.2.11}{Performance gain \(ROC, 1:1 comparison last BDT\) }{Outline0.3} \BOOKMARK [2][]{Outline0.4}{Conclusions}{}