TY - JOUR
T1 - Measurement of the mass and width of the W boson in e⁺e⁻ collisions at 189 GeV
AU - Abbiendi, G
AU - Ashby, Shaun
AU - Bloodworth, Ian
AU - Bright-Thomas, Paul
AU - Charlton, David
AU - Hawkes, Christopher
AU - Homer, Roger
AU - Jovanovic, Predrag
AU - Lloyd, Alun
AU - McMahon, Thomas
AU - O'Neale, Stephen
AU - Talbot, Scott
AU - Watson, Miriam
AU - Watkins, Peter
AU - Watson, Alan
AU - Watson, Nigel
AU - Wilson, John
PY - 2001/5/17
Y1 - 2001/5/17
N2 - The mass and width of the W boson are determined in e(+)e(-) collisions at LEP using 183 pb(-1) of data recorded at a centre-of-mass energy roots = 189 GeV with the OPAL detector, The invariant mass distributions from 970 W+W- --> qqqq and 1118 W+W- --> qq(l)v(l) candidate events are used to measure the mass of the W boson, M-W = 80.451 +/- 0.076 (stat.) +/- 0.049 (syst.) GeV, A direct measurement of the width of the W boson gives Gamma (W) = 2.09 +/- 0.18 (stat,) +/- 0.09 (syst,) GeV, The results are combined with previous OPAL results from 78 pb(-1) of data recorded with roots from 161 to 183 GeV, to obtain: M-W = 80.432 +/- 0.066 (stat,) +/- 0.035 (syst,) GeV, Gamma (W) = 2.04 +/- 0,16 (stat,) +/- 0.09 (syst.) GeV, The consistency of the direct measurement of Mw with that inferred from other measurements of electroweak parameters provides an important test of the Standard Model of electroweak interactions. (C) 2001 Elsevier Science B,V, All rights reserved.
AB - The mass and width of the W boson are determined in e(+)e(-) collisions at LEP using 183 pb(-1) of data recorded at a centre-of-mass energy roots = 189 GeV with the OPAL detector, The invariant mass distributions from 970 W+W- --> qqqq and 1118 W+W- --> qq(l)v(l) candidate events are used to measure the mass of the W boson, M-W = 80.451 +/- 0.076 (stat.) +/- 0.049 (syst.) GeV, A direct measurement of the width of the W boson gives Gamma (W) = 2.09 +/- 0.18 (stat,) +/- 0.09 (syst,) GeV, The results are combined with previous OPAL results from 78 pb(-1) of data recorded with roots from 161 to 183 GeV, to obtain: M-W = 80.432 +/- 0.066 (stat,) +/- 0.035 (syst,) GeV, Gamma (W) = 2.04 +/- 0,16 (stat,) +/- 0.09 (syst.) GeV, The consistency of the direct measurement of Mw with that inferred from other measurements of electroweak parameters provides an important test of the Standard Model of electroweak interactions. (C) 2001 Elsevier Science B,V, All rights reserved.
U2 - 10.1016/S0370-2693(01)00131-9
DO - 10.1016/S0370-2693(01)00131-9
M3 - Article
SN - 0370-2693
VL - 507
SP - 29
EP - 46
JO - Physics Letters B
JF - Physics Letters B
IS - 1-4
ER -