Measurement of the W boson mass using large rapidity electrons

Authors

B. Abbott, New York University, New York, New York 10003
Gregory R. Snow, University of Nebraska-LincolnFollow
D0 Collaboration

Date of this Version

12-4-2000

Comments

Published by American Physical Society. Phys. Rev. D VOLUME 62, 092006 (2000). http://prd.aps.org. Copyright © 2000 American Physical Society. Used by permission.

Abstract

We present a measurement of the W boson mass using data collected by the DØ. experiment at the Fermilab Tevatron during 1994–1995. We identify W bosons by their decays to en final states where the electron is detected in a forward calorimeter. We extract the W boson mass M_W by fitting the transverse mass and transverse electron and neutrino momentum spectra from a sample of 11 089 W→e_ν decay candidates. We use a sample of 1687 dielectron events, mostly due toZ→ee decays, to constrain our model of the detector response. Using the forward calorimeter data, we measure M_W=80.691±0.227 GeV. Combining the forward calorimeter measurements with our previously published central calorimeter results, we obtain M_W=80.482 ±0.091 GeV.