. (2008) Measurement of the mass and width of the W boson in e+e- collisions at s = 161–209 GeV. The European Physical Journal C, Vol.55 (No.1). pp. 1-38. ISSN 1434-6044

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Abstract

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-→ℓν̄ℓqq̄’ and W+W-→qq̄’q̄q’ channels. The W mass result for the combined data set is MW=803360055(Stat.)0028(Syst.)0025(FSI)0009(LEP)GeVc2 where FSI represents the uncertainty due to final state interaction effects in the qq̄’q̄q’ channel, and LEP represents that arising from the knowledge of the collision energy of the accelerator. The combined value for the W width is W=24040140(Stat.)0077(Syst.)0065(FSI)GeVc2 These results supersede all values previously published by the DELPHI collaboration. This paper is dedicated to the memory of Carlo Caso.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Journal or Publication Title:	The European Physical Journal C
Publisher:	Springer
ISSN:	1434-6044
Date:	May 2008
Volume:	Vol.55
Number:	No.1
Page Range:	pp. 1-38
Identification Number:	10.1140/epjc/s10052-008-0585-7
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
URI:	http://wrap.warwick.ac.uk/id/eprint/40110

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