A study of energy-energy correlations and measurement of [alpha][sub s] at the Z[sup 0] resonance

Conference · Wed Jan 01 04:00:00 EST 1992

OSTI ID:6887235

We present the energy-energy correlation (EEC) distribution and its asymmetry (AEEC) in hadronic decays of [Zeta][sup 0] bosons measured by the SLD at SLAC. The data are found to be in good agreement with the predictions of perturbative QCD and fragmentation Monte Carlo models of hadron production. After correction for hadronization effects the data are compared with [Omicron]([alpha][sub s][sup 2]) perturbative QCD calculations from various authors. Fits to the central region of the EEC yield substantially different values of the QCD scale [lambda][sub [ovr MS]] for each of the QCD calculations. There is also a sizeable dependence of the fitted [lambda][sub [ovr MS]] value on the QCD renormalization scale factor, f. Our preliminary results are [alpha][sub s](M [sub Z]) = 0.121 [plus minus] 0.002(stat.) [plus minus] 0.004(exp.sys.) [sub [minus]0.009][sup +0.016] (theor.) for EEC and [alpha][sub s](M[sub Z]) = 0.108 [plus minus] 0.003(stat.) [plus minus] 0.005(exp.sys.)[sub [minus]0.003][sup +0.008](theor.) for AEEC. The largest contribution to the error arises from the theoretical uncertainty in choosing the QCD renormalization scale.

• Research Organization: Tennessee Univ., Knoxville, TN (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG05-91ER40627
• OSTI ID: 6887235
• Report Number(s): CONF-920837-38; ON: DE93005894
• Country of Publication: United States
• Language: English

Related Subjects

662380* -- Decays of Intermediate Bosons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
CALCULATION METHODS
CORRELATIONS
COUPLING CONSTANTS
DECAY
ELEMENTARY PARTICLES
ERRORS
FIELD THEORIES
HADRONIC PARTICLE DECAY
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
MONTE CARLO METHOD
PARTICLE DECAY
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
RENORMALIZATION
STANFORD LINEAR COLLIDER DETECTOR
Z NEUTRAL BOSONS