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

Journal Article · Mon Apr 26 04:00:00 EDT 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.70.2515· OSTI ID:6498548

Abe, K; Abt, I; Acton, P D; Adolphsen, C E; Agnew, G; Alber, C; Alzofon, D F; Antilogus, P; Arroyo, C; Ash, W W; Ashford, V; Astbury, A; Aston, D; Au, Y; Axen, D A; Bacchetta, N; Baird, K G; Baker, W; Baltay, C; Band, H R ; Baranko, G; Bardon, O; Barrera, F; Battiston, R; Bazarko, A O; Bean, A; Beer, G; Belcinski, R J; Bell, R A; Ben-David, R; Benvenuti, A C; Berger, R; Berridge, S C; Bethke, S; Biasini, M; Bienz, T; Bilei, G M; Bird, F; Bisello, D; Blaylock, G; Blumberg, R; Bogart, J R; Bolton, T; Bougerolle, S; Bower, G R; Boyce, R F; Brau, J E; Breidenbach, M; Browder, T E; Bugg, W M; Burgess, B; Burke, D; Burnett, T H; Burrows, P N; Busza, W; Byers, B L; Calcaterra, A; Davis, R; Flynn, J; Fox, J D; Junk, T; Kunz, P F; Rowson, P C; Russell, J J; Swartz, M ^[1]

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1. Columbia University, New York, New York 10027 (United States) Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States) INFN Sezione di P

We present the first 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 91.55 GeV with the SLD detector at the SLAC Linear Collider which utilized a longitudinally polarized electron beam. The average beam polarization was (22.4[plus minus]0.6)%. Using a sample of 10 224 [ital Z] decays, we measure [ital A][sub [ital L][ital R]] to be 0.100[plus minus]0.044(stat)[plus minus]0.004(syst), which determines the effective weak mixing angle to be sin[sup 2][theta][sub [ital W]][sup [ital e][ital f][ital f]]=0.2378 [plus minus]0.0056(stat)[plus minus]0.0005(syst).

• OSTI ID: 6498548
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 70:17; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

662210 -- Specific Theories & Interaction Models
662310* -- Weak & Electromagnetic Interactions of Leptons-- (1992-)
662440 -- Properties of Other Particles Including Hypothetical Particles-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATOR FACILITIES
ACCELERATORS
ASYMMETRY
BEAMS
BOSONS
CABIBBO ANGLE
CROSS SECTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
GEV RANGE
GEV RANGE 10-100
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LEPTON-LEPTON INTERACTIONS
LINEAR ACCELERATORS
MATHEMATICAL MODELS
MIXING RATIO
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
POLARIZATION
POLARIZED BEAMS
Pa
Particle Systematics-- Unified Theories & Models-- (1992-)
STANDARD MODEL
STANFORD LINEAR COLLIDER
STANFORD LINEAR COLLIDER DETECTOR
TOTAL CROSS SECTIONS
UNIFIED GAUGE MODELS
Z NEUTRAL BOSONS