A measurement of the $W$ boson mass using electrons at large rapidities

We report a measurement of the W boson mass based on an integrated luminosity of 82/pb from p-pbar collisions at sqrt(s) = 1.8 TeV recorded in 1994-1995 by the D0 detector at the Fermilab Tevatron. We identify W bosons by their decays to e-nu, where the electron is detected in the forward calorimeters. We extract the mass by fitting the transverse mass and the electron and neutrino transverse momentum spectra of 11,089 W boson candidates. We measure Mw = 80.691 +- 0.227 GeV. By combining this measurement with our previously published central calorimeter results from data taken in 1992-1993 and 1994-1995, we obtain Mw = 80.482 +- 0.091 GeV.

Note:

published in Physical Review Letters Report-no: Fermilab-Pub-99-259-E Journal-ref: PRL 84, 222 (2000)

anti-p p: colliding beams
anti-p p: inclusive reaction
W: hadroproduction
W: leptonic decay
W: mass
mass spectrum: transverse
transverse momentum: spectrum
CDF
experimental results
Batavia TEVATRON Coll

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