First Run II Measurement of the W Boson Mass

Journal Article · Wed Aug 01 04:00:00 EDT 2007

OSTI ID:919950

Aaltonen, T; Abulencia, A; Adelman, J; Akimoto, T; Albrow, Michael G; Alvarez Gonzalez, B; Amerio, S; Amidei, Dante E; Anastassov, A; Annovi, A; Antos, J

We describe a measurement of the W boson mass m{sub W} using 200 pb{sup -1} of {radical}s = 1.96 TeV p{bar p} collision data taken with the CDF II detector. With a sample of 63,964 W {yields} e{nu} candidates and 51,128 W {yields} {mu}{nu} candidates, we measure m{sub W} = [80.413 {+-} 0.034(stat.) {+-} 0.034 (sys.) = 80.413 {+-} 0.048] GeV/c{sup 2}. This is the single most precise m{sub W} measurement to date. When combined with other measured electroweak parameters, this result further constrains the properties of new unobserved particles coupling to W and Z bosons.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 919950
• Report Number(s): FERMILAB-PUB-07-444-E; arXiv eprint number arXiv:0708.3642
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
Experiment-HEP
FERMILAB COLLIDER DETECTOR
INTERMEDIATE BOSONS