Tagging q/g and g->bb Jets at ATLAS

Details Tagging q/g and g->bb Jets at ATLAS Tagging q/g and g->bb Jets at ATLAS

Mar 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aps..aprr10009s&link_type=abstract

American Physical Society, APS April Meeting 2012, March 31-Apr 3, 2012, abstract #R10.009

Physics

Scientific paper

We present first results on jet tagging in ATLAS. First, we present the results of an implementation of a quark/gluon tagger built with tracking variables, and show that strong gluon rejection is possible even in high luminosity environments. We use template methods to validate the quark/gluon tagger in data. Second, we present results on a new technique developed to identify jets originating from a gluon that has split to bb. Jet substructure variables enable high levels of double bb-jet rejection. The ability to separate quark from gluon jets and single b-jets from gluons splitting to bb-jets can enhance the LHC discovery potential by rejecting gluon-dominated backgrounds.

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