PIRSA:13020135 Scientific Series Particle Physics

DOI10.48660/13020135

Series: Particle Physics

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

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

@misc{ pirsa_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},
  year = {2013},
  month = {feb},
  note = {PIRSA:13020135 see, \url{https://pirsa.org}}
}

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.

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