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          Institute: MPI für Physik     Collection: MPI für Physik     Display Documents



ID: 543869.0, MPI für Physik / MPI für Physik
Measurement of the mass and width of the W boson
Authors:The OPAL Collaboration; Abbiendi, G.
Date of Publication (YYYY-MM-DD):2006
Title of Journal:European Physical Journal C
Journal Abbrev.:Eur.Phys.J.C
Issue / Number:45
Start Page:307
End Page:335
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:The mass and width of the W boson are measured using e+e- -> W+W- events from the data sample collected by the OPAL experiment at LEP at centre-of-mass energies between 170 GeV and 209 GeV. The mass (mw) and width (gw) are determined using direct reconstruction of the kinematics of W+W- -> qqbarlv and W+W- -> qqbarqqbar events. When combined with previous OPAL measurements using W+W- -> lvlv events and the dependence on mw of the WW production cross-section at threshold, the results are determined to be mw = 80.415 +- 0.042 +- 0.030 +- 0.009 GeV gw = 1.996 +- 0.096 +- 0.102 +- 0.003 GeV where the first error is statistical, the second systematic and the third due to uncertainties in the value of the LEP beam energy. By measuring mw with several different jet algorithms in the qqbarqqbar channel, a limit is also obtained on possible final-state interactions due to colour reconnection effects in W+W- -> qqbarqqbar events. The consistency of the results for the W mass and width with those inferred from other electroweak parameters provides an important test of the Standard Model of electroweak interactions
Classification / Thesaurus:OPAL
Comment of the Author/Creator:49 pages, 9 figures, Submitted to Euro. Phys. J. C
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2005-188
URL:http://www.slac.stanford.edu/spires/find/hep/www?r...
URL:http://arXiv.org/abs/hep-ex/0508060
URL:http://publications.mppmu.mpg.de/?action=search&mp...
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