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Measurement of the mass and width of the W boson in e(+) e(-) collisions at root s=161-209 GeV
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2008 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 55, no 1, 1-38 p.Article in journal (Refereed) Published
Abstract [en]

A measurement of the W boson mass and width has been performed by the DELPHI collaboration using the data collected during the full LEP2 programme (1996-2000). The data sample has an integrated luminosity of 660 pb(-1) and was collected over a range of centre-of-mass energies from 161 to 209 GeV. Results are obtained by applying the method of direct reconstruction of the mass of the W from its decay products in both the W+W- -> l (nu) over bar (l) and W+W- -> q (q) over bar'(q) over barq'channels. The W mass result for the combined data set is M-W = 80.336 +/- 0.055(Stat.) +/- 0.028(Syst.) +/- 0.025(FSI) +/- 0.009(LEP) GeV/c(2) , where FSI represents the uncertainty due to final state interaction effects in the q (q) over bar'(q) over barq' channel, and LEP represents that arising from the knowledge of the collision energy of the accelerator. The combined value for the W width is Gamma(W) = 2.404 +/- 0.140(Stat.) +/- 0.077(Syst.) +/- 0.065(FSI) GeV/c(2). These results supersede all values previously published by the DELPHI collaboration.

Place, publisher, year, edition, pages
2008. Vol. 55, no 1, 1-38 p.
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-152142DOI: 10.1140/epjc/s10052-008-0585-7ISI: 000255742000001OAI: oai:DiVA.org:uu-152142DiVA: diva2:412531
Available from: 2011-04-25 Created: 2011-04-25 Last updated: 2011-04-25Bibliographically approved

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