000600215 001__ 600215
000600215 005__ 20231213211755.0
000600215 037__ $$aPUBDB-2023-07789
000600215 041__ $$aEnglish
000600215 1001_ $$0P:(DE-H253)PIP1091914$$aAperio Bella, Ludovica$$b0$$eCorresponding author$$udesy
000600215 1112_ $$aLHC Seminar
000600215 245__ $$aHow to precisely measure the W boson properties - the most recent ATLAS results$$f2023-07-11 - 
000600215 260__ $$c2023
000600215 3367_ $$033$$2EndNote$$aConference Paper
000600215 3367_ $$2DataCite$$aOther
000600215 3367_ $$2BibTeX$$aINPROCEEDINGS
000600215 3367_ $$2ORCID$$aLECTURE_SPEECH
000600215 3367_ $$0PUB:(DE-HGF)31$$2PUB:(DE-HGF)$$aTalk (non-conference)$$btalk$$mtalk$$s1702471740_3666
000600215 3367_ $$2DINI$$aOther
000600215 502__ $$cCERN
000600215 520__ $$ahe 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.
000600215 536__ $$0G:(DE-HGF)POF4-611$$a611 - Fundamental Particles and Forces (POF4-611)$$cPOF4-611$$fPOF IV$$x0
000600215 693__ $$0EXP:(DE-H253)LHC-Exp-ATLAS-20150101$$1EXP:(DE-588)4398783-7$$5EXP:(DE-H253)LHC-Exp-ATLAS-20150101$$aLHC$$eLHC: ATLAS$$x0
000600215 8564_ $$uhttps://bib-pubdb1.desy.de/record/600215/files/LAB_cern_seminar_WprecisionNEW.pdf$$yRestricted
000600215 8564_ $$uhttps://bib-pubdb1.desy.de/record/600215/files/LAB_cern_seminar_WprecisionNEW.pdf?subformat=pdfa$$xpdfa$$yRestricted
000600215 909CO $$ooai:bib-pubdb1.desy.de:600215$$pVDB
000600215 9101_ $$0I:(DE-588b)2008985-5$$6P:(DE-H253)PIP1091914$$aDeutsches Elektronen-Synchrotron$$b0$$kDESY
000600215 9131_ $$0G:(DE-HGF)POF4-611$$1G:(DE-HGF)POF4-610$$2G:(DE-HGF)POF4-600$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$aDE-HGF$$bForschungsbereich Materie$$lMatter and the Universe$$vFundamental Particles and Forces$$x0
000600215 9141_ $$y2023
000600215 9201_ $$0I:(DE-H253)ATLAS-20120731$$kATLAS$$lLHC/ATLAS Experiment$$x0
000600215 980__ $$atalk
000600215 980__ $$aVDB
000600215 980__ $$aI:(DE-H253)ATLAS-20120731
000600215 980__ $$aUNRESTRICTED