Preprint/Internal Report

DESY-2014-02377

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Performance of shower deconstruction in ATLAS

ATLAS Collaboration (Collaboration author)Extern*DESY*

2014

Report No.: ATLAS-CONF-2014-003

Abstract: This note describes the performance of the shower deconstruction algorithm, a jet tagging algorithm, using proton-proton collisions at a centre of mass energy of s √ =8 TeV . Data recorded with the ATLAS detector corresponding to an integrated luminosity of 14.2 fb −1 are considered. Using small-radius jets to probe the substructure of a large-radius jet, shower deconstruction assigns a probability based on an approximate parton shower model, that the jet originated from a massive particle. In this note, the shower deconstruction algorithm is investigated to identify jets produced from boosted, hadronically decaying top quarks. The performance is evaluated using events enriched in top-quark pairs in the lepton plus jets final state and a sample of dijet events. The distribution of the shower deconstruction observable, the likelihood ratio χ SD , is compared between data and simulation and the performance of shower deconstruction is compared to that of other tagging algorithms.

Note: 17 Feb 2014.Copyright 2014 CERN for the benefit of the ATLAS Collaboration. Reproduction of this article or parts of it is allowed as specified in the CC-BY-3.0 license.

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Contributing Institute(s):

1. LHC/ATLAS Experiment (ATLAS)

Research Program(s):

1. Experiments at LHC (ATLAS) (POF2-512) (POF2-512)

Experiment(s):

1. LHC: ATLAS

Appears in the scientific report 2014

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