Measurement of the e sup + e sup minus yields b b cross section and forward-backward charge asymmetry at a center-of-mass energy of 57. 2 GeV

Conference · Mon Jan 01 00:00:00 EST 1990

OSTI ID:6588254

Measurements of the e{sup +}e{sup {minus}} {yields} b{bar b} forward-backward charge asymmetry, A{sub b}, and the ratio of the cross-section for e{sup +}e{sup {minus}} {yields} b{bar b} to the theoretical QED cross-section for e{sup +}e{sup {minus}} {yields} {mu}{sup +}{mu}{sup {minus}}, R{sub b}, at an average center-of-mass energy of 57.2 GeV are reported. We use 196 multihadronic inclusive muon events corresponding to an integrated luminosity of 33.3 pb{sup {minus}1} accumulated by the AMY detector at TRISTAN. The results, A{sub b} = {minus}0.82 {plus minus} 0.25(stat) {plus minus} 0.14(syst) and R{sub b} = 0.47 {plus minus} 0.12 {plus minus} 0.10 are consistent with the standard model predictions of {minus}0.58 and 0.56, respectively. The results for the charge asymmetry are used to set a 90% confidence level limit on {chi}, the B{sup 0} {minus} {bar B}{sup 0} mixing parameter, of {chi} < 0.20. 15 refs., 5 figs.

• Research Organization: Louisiana State Univ., Baton Rouge, LA (USA)
• Sponsoring Organization: ASPRC; DOE/ER; JAMESC; KOSEF; National Science Foundation (NSF)
• DOE Contract Number: AS05-77ER05490
• OSTI ID: 6588254
• Report Number(s): CONF-900822-9; ON: DE90017404; TRN: 91-010610
• Resource Relation: Conference: 25. IUPAP international conference on high energy physics, Singapore (Singapore), 2-8 Aug 1990
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BEAUTY PARTICLES
PAIR PRODUCTION
ELECTRON-POSITRON INTERACTIONS
CROSS SECTIONS
ANGULAR DISTRIBUTION
ASYMMETRY
CENTER-OF-MASS SYSTEM
ERRORS
EXPERIMENTAL DATA
MUON PAIRS
STANDARD MODEL
TRANSVERSE MOMENTUM
Z NEUTRAL BOSONS
BOSONS
DATA
DISTRIBUTION
ELEMENTARY PARTICLES
INFORMATION
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LEPTON-LEPTON INTERACTIONS
LINEAR MOMENTUM
MATHEMATICAL MODELS
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE MODELS
UNIFIED GAUGE MODELS
645100* - High Energy Physics- Particle Interactions &amp; Properties-Experimental