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Measurement of the mass and width of the W boson in e(+)e(-) collisions at root s=189 GeV

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Measurement of the mass and width of the W boson in e(+)e(-) collisions at root s=189 GeV

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DELPHI Collaboration; Castillo Giménez, María Victoria; Cortina Gil, Eduardo; Costa Mezquita, María José; Ferrer Soria, Antonio; Fuster Verdú, Juan A.; García García, Carmen; Gil Botella, Inés; Hernández Rey, Juan José; Higón Rodríguez, Emilio; Oyanguren Campos, Arantza; Perepelitsa, V.; Salt Cairols, José; Tortosa Martínez, Pablo

Aquest document és un/a article, creat/da en: 2001

Este documento está disponible también en : 10.1016/S0370-2693(01)00453-1

A measurement of the W mass and width has been performed by the DELPHI collaboration using the data collected during 1998. The data sample has an integrated luminosity of 155 pb^{-1} and an average centre-of-mass energy of 188.6 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- -> lvqq and W+W- -> qqqq channels. The W mass result for the 1998 data set is M_W = 80.387 +/- 0.087 (stat) +/- 0.034 (syst) +/- 0.017 (LEP) +/- 0.035 (FSI) GeV/c2, where FSI represents the uncertainty due to final state interaction effects in the qqqq channel, and LEP represents that arising from the knowledge of the beam energy of the accelerator. Combining this result with those previously published by the DELPHI collaboration gives the result M_W = 80.359 +/- 0.074 (stat) +/- 0.032 (syst) +/- 0.017 (LEP) +/- 0.033 (FSI) GeV/... [Llegir més ...]

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