Prospects of the Multivariate b Quark Tagger for the Level 2 Trigger at D0

Details Prospects of the Multivariate b Quark Tagger for the Level 2 Trigger at D0 Prospects of the Multivariate b Quark Tagger for the Level 2 Trigger at D0

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprc14014n&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

Looking for b quark jets, e.g. from the decay of a Higgs boson, at a high rate p p-bar collider requires a large suppression factor of jets produced by light quarks. We will present the layout of the future implementation of D0's level 2 b quark tagger. In its current design it has to reject about 90% of the incoming events with an available processing time of about 10 ms event using relatively coarse level 2 data from D0 Run 2 detector. Combining several tagging parameters in a multivariate analysis method (support vector machine) has shown to increase the suppression power. We will show which parameters are used to identify b quark jets, how these parameters are combined using a support vector machine and what the performance of the tagger and its effect on D0's b quark event rate is expected to be.

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