Measurement of the W boson mass and the calibration of the muon momentum with the ATLAS detector
Мерење масе W бозона и калибрација импулса миона на детектору АТЛАС
Докторанд
Dimitrievska, Aleksandra R.Ментор
Vranješ, NenadЧланови комисије
Adžić, PetarBurić, Maja
Bonekamp, Marten
Živković, Lidija
Метаподаци
Приказ свих података о дисертацијиСажетак
U ovoj tezi je opisano meree mase W bozona, koje se zasniva na podacima
prikup enim na detektoru ATLAS tokom 2011. godine u proton{proton
sudarima na energiji od 7 TeV na Velikom sudaraqu hadrona (LHC). Prema
Standardnom modelu masa W bozona zavisi od mase top kvarka i mase
Higsovog bozona kroz korekcije vixeg reda. Preciznim mereem mase
top kvarka, W i Higsovog bozona mogue je testirae konzistentnosti
Standardnog modela, i bilo koje neslagae predstav a indirektan dokaz
postojaa qestica izvan Standardnog modela. Masa W bozona je preth-
odno izmerena na eksperimentima na Velikom eletron{pozitronskom su-
daraqu, kao i na eksperimentima CDF i D0 na proton{antiproton su-
daraqu Tevatron. Trenutna sreda vrednost izmerene mase W bozona
iznosi mW = 80385 15 MeV, dok je najpreciznije meree ostvareno na
eksperimentu CDF sa neodreenoxu 19 MeV. Sa druge strane, na osno-
vu globalnog fita parametara Standardnog modela predviena masa W
bozona iznosi mW = 80358 8 MeV...
In this thesis measurement of the W-boson mass based on data collected during 2011 in
proton–proton collisions at a centre-of-mass energy of 7 TeV with the ATLAS detector
at the Large Hadron Collider (LHC) is presented. In the Standard Model, the Wboson
mass depends on the top quark mass and the Higgs-boson mass through higher
order corrections. Therefore, a precise measurements the mass of the top quark, Wand
Higgs-boson, provide a stringent test of the Standard Model. Any observed inconsistency
can be an indirect proof of the physics beyond the Standard Model. Previous
measurements of the mass of the W boson are performed at the Large electron–positron
collider, and at the Tevatron proton–antiproton collider with the CDF and D0 experiments.
The current world average value of the W-boson mass is mW = 8038515 MeV,
while the most precise single measurement with an uncertainty of 19 MeV is performed
with the CDF experiment. On the other hand, the indirect constraint on the W-boson
mass f...rom the global electroweak fit predicts mW = 80358 8 MeV...