- Measurement of the W boson Mass and Width in $e^{+}e^{-}$ Collisions at LEP doi link

Author(s): Schael S., Barate R., Brunelière R., De Bonis I., Decamp D., Goy C., Jézéquel S., Lees J.P., Martin F., Merle E., Minard M.N., Pietrzyk B., Trocmé B., Badaud F., Dessagne S., Falvard Alain, Fayolle D., Gay P., Jousset J., Michel B., Monteil S., Pallin D., Pascolo J.M., Perret P., Blondel A., Brient J.-C., Machefert F., Rougé A., Videau H., Jacholkowska Agnieszka

(Article) Published: European Physical Journal C, vol. 47 p.309-335 (2006)
Links openAccess full text : arxiv

Ref HAL: in2p3-00085116_v1
Ref Arxiv: hep-ex/0605011
DOI: 10.1140/epjc/s2006-02576-8
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The mass of the W boson is determined from the direct reconstruction of its decays into purely hadronic and semi-leptonic events in e+e- collisions at LEP. The data sample corresponds to an integrated luminosity of 683 inverse picobarns collected with the ALEPH detector at centre-of-mass energies up to 209 GeV. To minimise any effect from colour reconnection a new procedure is adopted in which low energy particles are not considered in the mass determination from the purely hadronic channel. The combined result from all channels is Mw = 80.440+-0.043(stat.)+-0.024(syst.)+-0.009(FSI)+-0.009(LEP) GeV/c**2 where FSI represents the possible effects of final state interactions in the purely hadronic channel. From two-parameter fits to the W mass and width, the W width is found to be Gw = 2.14+-0.09(stat.)+-0.04(syst.)+-0.05(FSI)+-0.01(LEP) GeV

Comments: 45 pages, 23 figures - Subm. to Eur. Phys. J. C