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@PHDTHESIS{Harabasz:209913,
      author       = {Harabasz, Szymon and Salabura, Piotr},
      othercontributors = {Galatyuk, Tetyana},
      title        = {{R}econstruction of virtual photons from {A}u+{A}u
                      collisions at 1.23 {G}e{V}/u},
      school       = {TU Darmstadt},
      type         = {Dissertation},
      address      = {Darmstadt},
      publisher    = {TU Darmstadt},
      reportid     = {GSI-2018-00642},
      pages        = {174 p.},
      year         = {2016},
      note         = {1. Supervisor: Prof. Dr. phil. nat. Tetyana Galatyuk 2.
                      Supervisor: Prof. dr hab. Piotr Salabura 1. Referee:
                      Priv.-Doz. Dr. Anton Andronic 2. Referee: Prof. Dr. Bengt
                      Friman; Dissertation, TU Darmstadt, 2017},
      abstract     = {This thesis presents data analysis of dilepton excess
                      radiation in Au+Au at beam kinetic energy 1.23A GeV
                      experiment performed by HADES. It starts with an overview of
                      QCD symmetries and its thermodynamics properties. It is
                      followed by a discussion of details of experimental setup
                      that are necessary to understand the data analysis. The data
                      analysis itself is described in the main part of the
                      manuscript. This starts with tools and techniques that have
                      been used. An excellent performance of lepton identification
                      with a neural network, in terms of lepton sample purity, has
                      been proven. It is not possible to divide all e+ and e− in
                      a single event into correlated pairs and combinatorial
                      background must be estimated on a statistical way.
                      Reconstructed signal should be corrected for efficiency in
                      order to be compared with other measurements and theory
                      predictions. This is done by multiplying the signal after
                      background subtraction by a factor depending on the same
                      pair kinematic variable as the signal spectrum. After all
                      the analysis steps spectra are examined in order to make
                      physical statements. Average temperature of the medium
                      emitting dileptons was directly extracted from the fit to
                      the invariant mass. Comparison to model calculations showed
                      their consistency with the data in various},
      cin          = {HAD / HADES@GSI},
      cid          = {I:(DE-Ds200)HAD-20080822OR103 / I:(DE-Ds200)Coll-GSI-HADES},
      pnm          = {612 - Cosmic Matter in the Laboratory (POF3-612) /
                      HGF-IVF-VH-NG-823 - VH-NG-823 : HADES/CBM, VIP-QM -
                      exploring Quark Matter with VIrtual Photons
                      (HGF-IVF-VH-NG-823) / HGS-HIRe - HGS-HIRe for FAIR
                      (HGS-HIRe)},
      pid          = {G:(DE-HGF)POF3-612 / G:(DE-Ds200)HGF-IVF-VH-NG-823 /
                      G:(DE-Ds200)HGS-HIRe},
      typ          = {PUB:(DE-HGF)11},
      urn          = {urn:nbn:de:tuda-tuprints-66054},
      url          = {https://repository.gsi.de/record/209913},
}