The mass of the W boson is determined from the direct reconstruction of W decays in WW→qq̄qq̄ and WW→ℓνqq̄ events in e+e- collisions at LEP. The data sample corresponds to an integrated luminosity of 683 pb-1 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 qq̄qq̄ channel. The combined result from all channels is mW=80.440±0.043(stat.)±0.024(syst.)±0.009(FSI)±0.009(LEP)GeV/c2,where FSI represents the possible effects of final state interactions in the qq̄qq̄ channel and LEP indicates the uncertainty in the beam energy. From two-parameter fits to the W mass and width, the W width is found to be ΓW=2.14±0.09(stat.)±0.04(syst.)±0.05(FSI)±0.01(LEP)GeV

SCHAEL S, BARATE R, BRUNELIE, RE R, DE BONIS I, DECAMP D, et al. (2006). Measurement of the W boson mass and width in e+e- collisions at LEP. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 47(2), 309-335 [10.1140/epjc/s2006-02576-8].

Measurement of the W boson mass and width in e+e- collisions at LEP

RASO, Giuseppe;
2006-01-01

Abstract

The mass of the W boson is determined from the direct reconstruction of W decays in WW→qq̄qq̄ and WW→ℓνqq̄ events in e+e- collisions at LEP. The data sample corresponds to an integrated luminosity of 683 pb-1 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 qq̄qq̄ channel. The combined result from all channels is mW=80.440±0.043(stat.)±0.024(syst.)±0.009(FSI)±0.009(LEP)GeV/c2,where FSI represents the possible effects of final state interactions in the qq̄qq̄ channel and LEP indicates the uncertainty in the beam energy. From two-parameter fits to the W mass and width, the W width is found to be ΓW=2.14±0.09(stat.)±0.04(syst.)±0.05(FSI)±0.01(LEP)GeV
2006
SCHAEL S, BARATE R, BRUNELIE, RE R, DE BONIS I, DECAMP D, et al. (2006). Measurement of the W boson mass and width in e+e- collisions at LEP. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 47(2), 309-335 [10.1140/epjc/s2006-02576-8].
File in questo prodotto:
File Dimensione Formato  
Schael2006_Article_MeasurementOfTheWBosonMassAndW.pdf

accesso aperto

Dimensione 1.23 MB
Formato Adobe PDF
1.23 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/17270
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 52
  • ???jsp.display-item.citation.isi??? 40
social impact