Precise measurement of the left-right cross section asymmetry in [ital Z] boson production by [ital e][sup +][ital e][sup [minus]] collisions

We present a precise measurement of the left-right cross section asymmetry ([ital A][sub [ital L][ital R]]) for [ital Z] boson production by [ital e][sup +][ital e][sup [minus]] collisions. The measurement was performed at a center-of-mass energy of 91.26 GeV with the SLD detector at the SLAC Linear...

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Veröffentlicht in:	Physical review letters 1994-07, Vol.73:1
Hauptverfasser:	Abe, K., Abt, I., Ash, W.W., Aston, D., Bacchetta, N., Baird, K.G., Baltay, C., Band, H.R., Barakat, M.B., Baranko, G., Bardon, O., Barklow, T., Bazarko, A.O., Ben-David, R., Benvenuti, A.C., Bienz, T., Bilei, G.M., Bisello, D., Blaylock, G., Bogart, J.R., Bolton, T., Bower, G.R., Brau, J.E., Breidenbach, M., Bugg, W.M., Burke, D., Burnett, T.H., Burrows, P.N., Busza, W., Calcaterra, A., Caldwell, D.O., Calloway, D., Camanzi, B., Carpinelli, M., Cassell, R., Castaldi, R., Castro, A., Cavalli-Sforza, M., Church, E., Cohn, H.O., Coller, J.A., Cook, V., Cotton, R., Cowan, R.F., Coyne, D.G., D'Oliveira, A., Damerell, C.J.S., Dasu, S., Decker, F.J., De Sangro, R., De Simone, P., De Simone, S., Dell'Orso, R., Du, Y.C., Dubois, R., Duboscq, J.E., Eisenstein, B.I., Elia, R., Emma, P., Fan, C., Fero, M.J., Frey, R., Furuno, K., Garwin, E.L., Gillman, T., Gladding, G., Gonzalez, S., Hallewell, G.D., Hart, E.L., Hasegawa, Y., Hedges, S., Hertzbach, S.S., Hildreth, M.D., Hitlin, D.G., Huber, J., H
Format:	Artikel
Sprache:	eng
Schlagworte:	662310 - Weak & Electromagnetic Interactions of Leptons- (1992-) 662440 - Properties of Other Particles Including Hypothetical Particles- (1992-) ACCELERATOR FACILITIES ACCELERATORS ASYMMETRY BEAMS BOSONS CENTER-OF-MASS SYSTEM CROSS SECTIONS ELECTRON BEAMS ELECTRON-POSITRON INTERACTIONS ELEMENTARY PARTICLES ENERGY RANGE GEV RANGE INTERACTIONS INTERMEDIATE BOSONS INTERMEDIATE VECTOR BOSONS LEPTON BEAMS LEPTON-LEPTON INTERACTIONS LINEAR ACCELERATORS PARTICLE BEAMS PARTICLE INTERACTIONS PARTICLE PRODUCTION PHYSICS OF ELEMENTARY PARTICLES AND FIELDS POLARIZED BEAMS STANFORD LINEAR COLLIDER Z NEUTRAL BOSONS
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Beschreibung
Zusammenfassung:	We present a precise measurement of the left-right cross section asymmetry ([ital A][sub [ital L][ital R]]) for [ital Z] boson production by [ital e][sup +][ital e][sup [minus]] collisions. The measurement was performed at a center-of-mass energy of 91.26 GeV with the SLD detector at the SLAC Linear Collider (SLC). The luminosity-weighted average polarization of the SLC electron beam was (63.0[plus minus]1.1)%. Using a sample of 49 392 [ital Z] decays, we measure [ital A][sub [ital L][ital R]] to be 0.1628[plus minus]0.0071(stat)[plus minus]0.0028(syst) which determines the effective weak mixing angle to be sin[sup 2][theta][sub [ital W]][sup eff]=0.2292[plus minus]0.0009(stat) [plus minus]0.0004(syst).
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.73.25