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- Qanti-kt: Nondeterministic jet clustering

The

interpretation of events with jets is often ambiguous, especially for the sort

of highly complex events one encounters at the LHC. One often finds that

an event interpreted as signal-like using one choice of jet algorithm and

radius parameter is no longer signal-like with another, even if the two are

very similar. Here we present an extension of the Qjets procedure

designed to account for this ambiguity and assign each plausible interpretation

of an event a weight, so that events which are unambiguously signal-like carry

more influence on one's results than events which are only marginally so.

This procedure can be used with any existing analysis employing a

sequential recombination algorithm like anti-kT and we will show that through

its use the statistical power of an analysis often increases. In

particular, we will see that a up to a 20\% improvement in statistical

significance can be realized for a Higgs-like analysis searching for a

resonance recoiling against an associated vector boson.

Collection/Series:

Event Type:

Seminar

Scientific Area(s):

Speaker(s):

Event Date:

Tuesday, February 19, 2013 - 13:00 to 14:30

Location:

Space Room

Room #:

400

©2012 Perimeter Institute for Theoretical Physics