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Title: Modelling Z→TT processes in ATLAS with T-embedded Z →μμ data

Abstract

© CERN 2015 for the benefit of the ATLAS collaboration. This paper describes the concept, technical realisation and validation of a largely data-driven method to model events with Zττ decays. In Zμμ events selected from proton-proton collision data recorded at s=8 TeV with the ATLAS experiment at the LHC in 2012,the Z decay muons are replaced by τ leptons from simulated Zarrowττ decays at the level of reconstructed tracks and calorimeter cells. The τ lepton kinematics are derived from the kinematics of the original muons. Thus, only the well-understood decays of the Z boson and τ leptons as well as the detector response to the τ decay products are obtained from simulation. All other aspects of the event, such as the Z boson and jet kinematics as well as effects from multiple interactions, are given by the actual data. This so-called τ-embedding method is particularly relevant for Higgs boson searches and analyses in ττ final states, where Zarrowττ decays constitute a large irreducible background that cannot be obtained directly from data control samples. In this paper, the relevant concepts are discussed based on the implementation used in the ATLAS Standard Model Hττ analysis of the full datataset recorded during 2011more » and 2012.« less

Authors:
 [1]
  1. Aix-Marseille Univ., and CNRS/IN2P3, Marseille (France). et al.
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Org.:
The ATLAS Collaboration
OSTI Identifier:
1254175
Alternate Identifier(s):
OSTI ID: 1407393
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Instrumentation
Additional Journal Information:
Journal Volume: 10; Journal Issue: 09; Journal ID: ISSN 1748-0221
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Performance of High Energy Physics Detectors; Simulation methods and programs; Analysis and statistical methods

Citation Formats

Aad, G. Modelling Z→TT processes in ATLAS with T-embedded Z →μμ data. United States: N. p., 2015. Web. doi:10.1088/1748-0221/10/09/p09018.
Aad, G. Modelling Z→TT processes in ATLAS with T-embedded Z →μμ data. United States. https://doi.org/10.1088/1748-0221/10/09/p09018
Aad, G. 2015. "Modelling Z→TT processes in ATLAS with T-embedded Z →μμ data". United States. https://doi.org/10.1088/1748-0221/10/09/p09018. https://www.osti.gov/servlets/purl/1254175.
@article{osti_1254175,
title = {Modelling Z→TT processes in ATLAS with T-embedded Z →μμ data},
author = {Aad, G.},
abstractNote = {© CERN 2015 for the benefit of the ATLAS collaboration. This paper describes the concept, technical realisation and validation of a largely data-driven method to model events with Zττ decays. In Zμμ events selected from proton-proton collision data recorded at s=8 TeV with the ATLAS experiment at the LHC in 2012,the Z decay muons are replaced by τ leptons from simulated Zarrowττ decays at the level of reconstructed tracks and calorimeter cells. The τ lepton kinematics are derived from the kinematics of the original muons. Thus, only the well-understood decays of the Z boson and τ leptons as well as the detector response to the τ decay products are obtained from simulation. All other aspects of the event, such as the Z boson and jet kinematics as well as effects from multiple interactions, are given by the actual data. This so-called τ-embedding method is particularly relevant for Higgs boson searches and analyses in ττ final states, where Zarrowττ decays constitute a large irreducible background that cannot be obtained directly from data control samples. In this paper, the relevant concepts are discussed based on the implementation used in the ATLAS Standard Model Hττ analysis of the full datataset recorded during 2011 and 2012.},
doi = {10.1088/1748-0221/10/09/p09018},
url = {https://www.osti.gov/biblio/1254175}, journal = {Journal of Instrumentation},
issn = {1748-0221},
number = 09,
volume = 10,
place = {United States},
year = {Tue Sep 15 00:00:00 EDT 2015},
month = {Tue Sep 15 00:00:00 EDT 2015}
}

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Works referenced in this record:

TauSpinner program for studies on spin effect in tau production at the LHC
journal, April 2012


Works referencing / citing this record:

Search for lepton-flavour-violating decays of the Higgs and Z bosons with the ATLAS detector
journal, February 2017


Search for lepton-flavour-violating decays of the Higgs and $Z$ bosons with the ATLAS detector
text, January 2017