Advertisement

Event Selection and Reconstruction

  • Boris LemmerEmail author
Chapter
  • 183 Downloads
Part of the Springer Theses book series (Springer Theses)

Abstract

With the \(\ell +\text {jets}\) channel as the \(t\bar{t}\) final state under study, advantages and challenges come along. Every event provides the necessary information for full reconstruction of all the objects of interest. The dilepton channel suffers from the ambiguity of two undetected neutrinos, making it hard to reconstruct both of them correctly. In contrast, using assumptions such as the masses of the top quark and the W boson, the whole \(t\bar{t}\) event can be reconstructed in the \(\ell +\text {jets}\) channel.

Keywords

Reconstructed Object Reconstruction Efficiency Spin Analyser Transfer Function Parameter Veto Method 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    ATLAS Collaboration, Measurement of the jet multiplicity in top anti-top final states produced in 7 TeV proton-proton collisions with the ATLAS detector, ATLAS-CONF-2012-155Google Scholar
  2. 2.
    J. Erdmann et al., A likelihood-based reconstruction algorithm for top-quark pairs and the KLFitter framework. Nucl. Instrum. Methods A748, 18 (2014)Google Scholar
  3. 3.
    A. Caldwell, D. Kollar, K. Kröninger, BAT: The Bayesian Analysis Toolkit. Comput. Phys. Commun. 180, 2197 (2009)Google Scholar
  4. 4.
    ATLAS Collaboration, Measurement of the W boson polarization in top quark decays with the ATLAS detector. JHEP 1206, 088 (2012)Google Scholar
  5. 5.
    ATLAS Collaboration, Measurement of the top quark mass with the template method in the \(t \bar{t}\) \(\rightarrow \) lepton + jets channel using ATLAS data. Eur. Phys. J. C72, 2046 (2012)Google Scholar
  6. 6.
    ATLAS Collaboration, Measurement of the top quark pair production charge asymmetry in proton-proton collisions at \(\sqrt{s}\) = 7 TeV using the ATLAS detector. JHEP 1402, 107 (2014)Google Scholar
  7. 7.
    ATLAS Collaboration, Measurement of top quark polarization in top-antitop events from proton-proton collisions at \(\sqrt{s}\) = 7 TeV using the ATLAS detector. Phys. Rev. Lett. 111, 232002 (2013)Google Scholar
  8. 8.
    ATLAS Collaboration, Measurements of top quark pair relative differential cross-sections with ATLAS in \(pp\) collisions at \(\sqrt{s}=7\) TeV. Eur. Phys. J. C73, 2261 (2013)Google Scholar
  9. 9.
    ATLAS Collaboration, Search for the Standard Model Higgs boson produced in association with top quarks in proton-proton collisions at \(\sqrt{s}\) = 7 TeV using the ATLAS detector, ATLAS-CONF-2012-135Google Scholar
  10. 10.
    ATLAS Collaboration, Measurement of the mistag rate with 5 fb\({}^{-1}\) of data collected by the ATLAS detector, ATLAS-CONF-2012-040Google Scholar
  11. 11.
    ATLAS Collaboration, Performance of missing transverse momentum reconstruction in proton-proton collisions at 7 TeV with ATLAS. Eur. Phys. J. C72, 1844 (2012)Google Scholar
  12. 12.
    F. Pasternok, Studies of systematic uncertainties of transfer functions used in the klfitter for top quark reconstruction, II.Physik-UniGö-BSc-2011/02. Bachelor Thesis, Göttingen UniversityGoogle Scholar
  13. 13.
    M. Jezabek, J.H. Kühn, V-A tests through leptons from polarized top quarks. Phys. Lett. B329, 317 (1994)Google Scholar
  14. 14.
    A. Brandenburg, Z. Si, P. Uwer, QCD corrected spin analyzing power of jets in decays of polarized top quarks. Phys. Lett. B539, 235 (2002)Google Scholar
  15. 15.
    M. Jezabek, Top quark physics. Nucl. Phys. Proc. Suppl. 37B, 197 (1994)Google Scholar

Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  1. 1.II. Physikalisches InstitutGeorg-August-Universität GöttingenGöttingenGermany

Personalised recommendations