A multivariate approach to heavy flavour tagging with cascade training

Details A multivariate approach to heavy flavour tagging with cascade training A multivariate approach to heavy flavour tagging with cascade training

2007-04-27

arxiv.org/abs/0704.3706v2

JINST 2:P11007,2007

Physics

Data Analysis, Statistics and Probability

14 pages, 12 figures, revised version

Scientific paper

10.1088/1748-0221/2/11/P11007

This paper compares the performance of artificial neural networks and boosted decision trees, with and without cascade training, for tagging b-jets in a collider experiment. It is shown, using a Monte Carlo simulation of $WH \to l\nu q\bar{q}$ events, that for a b-tagging efficiency of 50%, the light jet rejection power given by boosted decision trees without cascade training is about 55% higher than that given by artificial neural networks. The cascade training technique can improve the performance of boosted decision trees and artificial neural networks at this b-tagging efficiency level by about 35% and 80% respectively. We conclude that the cascade trained boosted decision trees method is the most promising technique for tagging heavy flavours at collider experiments.

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