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@PHDTHESIS{Trofymov:398392,
      author       = {Trofymov, Artur},
      othercontributors = {Glazov, Alexander and Schleper, Peter},
      title        = {{M}easurements of $\mathrm{{W}^±}$ and top-quark pair to
                      {Z}-boson cross-section ratios at $\mathrm{\sqrt{s}}$ = 13,
                      8, 7 {T}e{V} with the {ATLAS} detector},
      school       = {Universität Hamburg},
      type         = {Dissertation},
      address      = {Hamburg},
      publisher    = {Verlag Deutsches Elektronen-Synchrotron},
      reportid     = {PUBDB-2017-13967, DESY-THESIS-2018-001},
      series       = {DESY-THESIS},
      pages        = {212},
      year         = {2018},
      note         = {Dissertation, Universität Hamburg, 2017},
      abstract     = {Measurements of the $Z \rightarrow \ell^+\ell^-$ production
                      cross sections, where ` = e; , in protonprotoncollisions at
                      ps = 13 TeV are presented using two sets of data recorded by
                      the ATLAS experiment at the Large Hadron Collider. The data
                      sets correspond to a totalintegrated luminosity of 81
                      pb$^{-1}$ and 3:2 fb$^{-1}$ collected in 2015 using the 50
                      ns and25 ns bunch spacing congurations, respectively. The
                      cross section obtained with 50 nsconguration is used for W
                      to Z cross-section ratio measurement. The W+ to W- boson
                      production cross-section ratio is also measured. The ratios
                      of measured ducial crosss ections for electron and muon
                      decay channels of the W and Z boson are evaluated
                      andcompared to the Standard Model expectations of the lepton
                      universality.Ratio of top-quark pair to Z-boson production
                      cross section is measured at ps = 13 TeVusing 25 ns bunch
                      spacing data. Similar ratios are obtained at ps = 8 TeV and
                      7 TeVusing the published ATLAS results corrected to a common
                      phase space. Single ratios, ata given ps for the two
                      processes and at dierent ps for each process, as well as
                      doubleratios of the two processes at dierent ps, are
                      evaluated. The results are compared to calculationsperformed
                      at next-to-next-to-leading-order accuracy using recent sets
                      of partondistribution functions. The data used for tt to
                      Z-boson cross section ratios demonstratesignicant power to
                      constrain the gluon distribution function for the Bjorken-x
                      valuesnear 0.1 and the light-quark sea for x < 0:02.},
      cin          = {ATLAS},
      cid          = {I:(DE-H253)ATLAS-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF3-611)},
      pid          = {G:(DE-HGF)POF3-611},
      experiment   = {EXP:(DE-H253)LHC-Exp-ATLAS-20150101},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)29 / PUB:(DE-HGF)11},
      doi          = {10.3204/PUBDB-2017-13967},
      url          = {https://bib-pubdb1.desy.de/record/398392},
}