PIRSA:13020135

Video URL

https://pirsa.org/13020135

Qanti-kt: Nondeterministic jet clustering

Krohn, D. (2013). Qanti-kt: Nondeterministic jet clustering. Perimeter Institute for Theoretical Physics. https://pirsa.org/13020135

Krohn, David. Qanti-kt: Nondeterministic jet clustering. Perimeter Institute for Theoretical Physics, Feb. 19, 2013, https://pirsa.org/13020135 

          @misc{ scivideos_PIRSA:13020135,
            doi = {10.48660/13020135},
            url = {https://pirsa.org/13020135},
            author = {Krohn, David},
            keywords = {Particle Physics},
            language = {en},
            title = {Qanti-kt: Nondeterministic jet clustering},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2013},
            month = {feb},
            note = {PIRSA:13020135 see, \url{https://scivideos.org/index.php/pirsa/13020135}}
          }

David Krohn Harvard University

Talk numberPIRSA:13020135
DOI10.48660/13020135
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

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.