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@INPROCEEDINGS{AperioBella:600215,
      author       = {Aperio Bella, Ludovica},
      title        = {{H}ow to precisely measure the {W} boson properties - the
                      most recent {ATLAS} results},
      school       = {CERN},
      reportid     = {PUBDB-2023-07789},
      year         = {2023},
      abstract     = {he Standard Model is the most powerful theory describing
                      the fundamental constituents of matter and their
                      interactions. Historically, relations between the
                      fundamental parameters of the SM have been used to predict
                      the mass of the top quark and to put constraints on the
                      Higgs boson mass before these particles were experimentally
                      confirmed. Today, the indirect determination of the W-boson
                      mass from global electroweak fits outperforms the precision
                      of its experimentally measured value. An improved
                      experimental measurement is, therefore, one of the goals of
                      the LHC physics program, aiming to test the overall
                      consistency of the Standard Model and possibly reveal new,
                      conflicting phenomena.The seminar will discuss the improved
                      measurement of the mass of the W boson at a centre-of-mass
                      energy of 7 TeV, recently released by the ATLAS
                      Collaboration. The previous ATLAS measurement is
                      re-evaluated using a profile likelihood fit, which improves
                      the precision of the mass determination by $15\%$ by fully
                      exploiting the information present in data.Further
                      improvements of the mass measurements are challenging and
                      the modelling of the W-boson production and decay is one of
                      the limiting factors to ultimately reach an uncertainty of
                      10 MeV at the LHC. New ATLAS measurements of the W and Z
                      boson transverse momenta at a 5 and 13 TeV will also be
                      presented. This remarkable analysis is performed using
                      dedicated LHC runs with reduced instantaneous luminosity.
                      Such an experimental environment is favourable for the
                      reconstruction of the W-boson transverse momentum from the
                      hadronic recoil. A high resolution of the hadronic recoil
                      allows the low transverse momentum of the W boson to be
                      measured with unprecedented granularity. The measurement
                      provides a fundamental input for reducing the
                      physics-modelling uncertainties in future W-boson mass
                      determinations.},
      organization  = {LHC Seminar,},
      cin          = {ATLAS},
      cid          = {I:(DE-H253)ATLAS-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611)},
      pid          = {G:(DE-HGF)POF4-611},
      experiment   = {EXP:(DE-H253)LHC-Exp-ATLAS-20150101},
      typ          = {PUB:(DE-HGF)31},
      url          = {https://bib-pubdb1.desy.de/record/600215},
}