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001     600215
005     20231213211755.0
037 _ _ |a PUBDB-2023-07789
041 _ _ |a English
100 1 _ |a Aperio Bella, Ludovica
|0 P:(DE-H253)PIP1091914
|b 0
|e Corresponding author
|u desy
111 2 _ |a LHC Seminar
245 _ _ |a How to precisely measure the W boson properties - the most recent ATLAS results
|f 2023-07-11 -
260 _ _ |c 2023
336 7 _ |a Conference Paper
|0 33
|2 EndNote
336 7 _ |a Other
|2 DataCite
336 7 _ |a INPROCEEDINGS
|2 BibTeX
336 7 _ |a LECTURE_SPEECH
|2 ORCID
336 7 _ |a Talk (non-conference)
|b talk
|m talk
|0 PUB:(DE-HGF)31
|s 1702471740_3666
|2 PUB:(DE-HGF)
336 7 _ |a Other
|2 DINI
502 _ _ |c CERN
520 _ _ |a 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.
536 _ _ |a 611 - Fundamental Particles and Forces (POF4-611)
|0 G:(DE-HGF)POF4-611
|c POF4-611
|f POF IV
|x 0
693 _ _ |a LHC
|e LHC: ATLAS
|1 EXP:(DE-588)4398783-7
|0 EXP:(DE-H253)LHC-Exp-ATLAS-20150101
|5 EXP:(DE-H253)LHC-Exp-ATLAS-20150101
|x 0
856 4 _ |u https://bib-pubdb1.desy.de/record/600215/files/LAB_cern_seminar_WprecisionNEW.pdf
|y Restricted
856 4 _ |u https://bib-pubdb1.desy.de/record/600215/files/LAB_cern_seminar_WprecisionNEW.pdf?subformat=pdfa
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|y Restricted
909 C O |o oai:bib-pubdb1.desy.de:600215
|p VDB
910 1 _ |a Deutsches Elektronen-Synchrotron
|0 I:(DE-588b)2008985-5
|k DESY
|b 0
|6 P:(DE-H253)PIP1091914
913 1 _ |a DE-HGF
|b Forschungsbereich Materie
|l Matter and the Universe
|1 G:(DE-HGF)POF4-610
|0 G:(DE-HGF)POF4-611
|3 G:(DE-HGF)POF4
|2 G:(DE-HGF)POF4-600
|4 G:(DE-HGF)POF
|v Fundamental Particles and Forces
|x 0
914 1 _ |y 2023
920 1 _ |0 I:(DE-H253)ATLAS-20120731
|k ATLAS
|l LHC/ATLAS Experiment
|x 0
980 _ _ |a talk
980 _ _ |a VDB
980 _ _ |a I:(DE-H253)ATLAS-20120731
980 _ _ |a UNRESTRICTED

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