A Measurement of the $$W$$ Boson Mass in $$p\bar{p}$$ Collisions at a Center-of-Mass Energy of 1.8-TeV

Thesis/Dissertation · Mon Jan 01 04:00:00 EST 1996

DOI:https://doi.org/10.2172/1421753· OSTI ID:1421753

Flattum, Eric M. ^[1]

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1. Michigan State U.

A measurement of the W boson mass has been performed using $$W \to e\nu$$ decays in $$p\bar{p}$$ collisions at $$\sqrt{s}$$ = 1.8 TeV at D0 from the 1994-1995 Tevatron run. The mass is determined by fitting to the transverse mass distribution of the $$W$$ boson events which have an electron in the central calorimeter ($$\mid \eta \mid < 1.0$$). The number of events in the fit region of 60 < $$m_t$$ < 90 GeV = $c^2$ is 27,040. The constraints on the model are determined from a sample of 1562 $$Z \to ee$$ events. The measured W boson mass is $$M_W$$ = 80.346 $$\pm$$ 0.069 (stat:) $$\pm$$ 0.091 (syst:) $$\pm$$ 0.077(scale). This is the most precise measurement of the W boson mass to date.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1421753
• Report Number(s): FERMILAB-THESIS-1996-10; UMI-97-18824; 430577
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS