Measurement of the mass of the W boson in ee collisions using the fully leptonic channel

  • G. Abbiendi et al.
Experimental Physics


A novel method of determining the mass of the W boson in the \({\rm W^+ W^-} \to \ell \nu \ell^\prime \nu^\prime\) channel is presented and applied to 667 pb-1 of data recorded at center-of-mass energies in the range 183-207 GeV with the OPAL detector at LEP. The measured energies of charged leptons and the results of a new procedure based on an approximate kinematic reconstruction of the events are combined to give: \(\) where the first error is statistical and the second is systematic. The systematic error is dominated by the uncertainty on the lepton energy, which is calibrated using data, and the parameterization of the variables used in the fitting, which is obtained using Monte Carlo events. Both of these are limited by statistics.


Systematic Error Opal Detector Charged Lepton Measured Energy Monte Carlo Event 
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Copyright information

© Springer-Verlag Berlin Heidelberg / Società Italiana di Fisica 2002

Authors and Affiliations

  • G. Abbiendi et al.
    • 1
  1. 1.Dipartimento di Fisica dell' Università di Bologna and INFN, 40126 Bologna, Italy IT

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