CHARGE ASYMMETRY IN ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit q}}{{\overline{\mathit q}}}$ INSPIRE search

Summed over five lighter flavors.

Experimental and Standard Model values are somewhat event-selection dependent. Standard Model expectations contain some assumptions on ${{\mathit B}^{0}}-{{\overline{\mathit B}}^{0}}$ mixing and on other electroweak parameters.

S044Z0Q

ASYMMETRY ${\mathrm {(\%)}}$

STD. MODEL

$\sqrt {\mathit s }$ ${\mathrm {(GeV)}}$

DOCUMENT ID

TECN

• • • We do not use the following data for averages, fits, limits, etc. • • •

$ -0.76 \pm0.12 \pm0.15 $

$91.2$

ABREU

1992

DLPH

$ 4.0 \pm0.4 \pm0.63 $

$4.0$

$91.3$

ACTON

1992

OPAL

$ 9.1 \pm1.4 \pm1.6 $

$9.0$

$57.9$

ADACHI

1991

TOPZ

$ -0.84 \pm0.15 \pm0.04 $

$91$

DECAMP

1991

ALEP

$ 8.3 \pm2.9 \pm1.9 $

$8.7$

$56.6$

STUART

1990

AMY

$ 11.4 \pm2.2 \pm2.1 $

$8.7$

$57.6$

ABE

1989

VNS

$ 6.0 \pm1.3 $

$5.0$

$34.8$

GREENSHAW

1989

JADE

$ 8.2 \pm2.9 $

$8.5$

$43.6$

GREENSHAW

1989

JADE

¹ ABREU 1992I has $0.14$ systematic error due to uncertainty of quark fragmentation.

² ACTON 1992L use the weight function method on 259k selected ${{\mathit Z}}$ $\rightarrow$ hadrons events. The systematic error includes a contribution of $0.2$ due to ${{\mathit B}^{0}}-{{\overline{\mathit B}}^{0}}$ mixing effect, $0.4$ due to Monte Carlo (MC) fragmentation uncertainties and $0.3$ due to MC statistics. ACTON 1992L derive a value of sin$^2\theta {}^{{\mathrm {eff}}}_{{{\mathit W}}}$ to be $0.2321$ $\pm0.0017$ $\pm0.0028$.

References:

ABREU

1992I

PL B277 371

A Measurement of sin$^2\theta _{W}$ from the Charge Asymmetry of Hadronic Events at the ${{\mathit Z}^{0}}$ Peak

ACTON

1992L

PL B294 436

A Measurement of the Forward-Backward Charge Asymmetry in Hadronic Decays of the${{\mathit Z}^{0}}$

ADACHI

1991

PL B255 613

Charge Asymmetry of Hadronic Events in ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ Annihilation at $\sqrt {s }$ = 57.9 GeV

DECAMP

1991B

PL B259 377

Measurement of Charge Asymmetry in Hadronic ${{\mathit Z}^{0}}$ Decays

STUART

1990

PRL 64 983

Forward Backward Charge Asymmetry in ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ jets

ABE

1989L

PL B232 425

Charge Asymmetry of Hadron Jets and Limits on the Compositeness Scales in ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${\mathit {\mathit q}}$ ${\mathit {\overline{\mathit q}}}$ Reaction at $\sqrt {s }$ = 57.6 GeV

GREENSHAW

1989

ZPHY C42 1

A Measurement of the Charge Asymmetry of Hadronic Events in Electron Positron Annihilation