# $\boldsymbol A{}^{(0,{{\boldsymbol \mu}})}_{\boldsymbol FB}$ CHARGE ASYMMETRY IN ${{\boldsymbol e}^{+}}$ ${{\boldsymbol e}^{-}}$ $\rightarrow$ ${{\boldsymbol \mu}^{+}}{{\boldsymbol \mu}^{-}}$ INSPIRE search

OUR FIT is obtained using the fit procedure and correlations as determined by the LEP Electroweak Working Group (see the note The ${{\mathit Z}}$ boson'' and ref. LEP-SLC 2006 ). For the ${{\mathit Z}}$ peak, we report the pole asymmetry defined by (3/4)$\mathit A_{{{\mathit e}}}\mathit A_{{{\mathit \mu}}}$ as determined by the nine-parameter fit to cross-section and lepton forward-backward asymmetry data.
ASYMMETRY ${\mathrm {(\%)}}$ STD. MODEL $\sqrt {\mathit s }$ ${\mathrm {(GeV)}}$ DOCUMENT ID TECN
$\bf{ 1.69 \pm0.13}$ OUR FIT
$1.59 \pm0.23$ $1.57$ $91.2$ 1
 2001 A
OPAL
$1.65 \pm0.25$ $1.57$ $91.2$
 2000 F
DLPH
$1.88 \pm0.33$ $1.57$ $91.2$
 2000 C
L3
$1.71 \pm0.24$ $1.57$ $91.2$ 2
 2000 C
ALEP
• • • We do not use the following data for averages, fits, limits, etc. • • •
$9 \pm30$ $-1.3$ $20$ 3
 1995 M
DLPH
$7 \pm26$ $-8.3$ $40$ 3
 1995 M
DLPH
$-11 \pm33$ $-24.1$ $57$ 3
 1995 M
DLPH
$-62 \pm17$ $-44.6$ $69$ 3
 1995 M
DLPH
$-56 \pm10$ $-63.5$ $79$ 3
 1995 M
DLPH
$-13 \pm5$ $-34.4$ $87.5$ 3
 1995 M
DLPH
$-29.0 {}^{+5.0}_{-4.8} \pm0.5$ $-32.1$ $56.9$ 4
 1990 I
VNS
$-9.9 \pm1.5 \pm0.5$ $-9.2$ $35$
 1990
$0.05 \pm0.22$ $0.026$ $91.14$ 5
 1989 D
MRK2
$-43.4 \pm17.0$ $-24.9$ $52.0$ 6
 1989
AMY
$-11.0 \pm16.5$ $-29.4$ $55.0$ 6
 1989
AMY
$-30.0 \pm12.4$ $-31.2$ $56.0$ 6
 1989
AMY
$-46.2 \pm14.9$ $-33.0$ $57.0$ 6
 1989
AMY
$-29 \pm13$ $-25.9$ $53.3$
 1988 C
TOPZ
$+5.3 \pm5.0 \pm0.5$ $-1.2$ $14.0$
 1988
MRKJ
$-10.4 \pm1.3 \pm0.5$ $-8.6$ $34.8$
 1988
MRKJ
$-12.3 \pm5.3 \pm0.5$ $-10.7$ $38.3$
 1988
MRKJ
$-15.6 \pm3.0 \pm0.5$ $-14.9$ $43.8$
 1988
MRKJ
$-1.0 \pm6.0$ $-1.2$ $13.9$
 1988 D
TASS
$-9.1 \pm2.3 \pm0.5$ $-8.6$ $34.5$
 1988 D
TASS
$-10.6 {}^{+2.2}_{-2.3} \pm0.5$ $-8.9$ $35.0$
 1988 D
TASS
$-17.6 {}^{+4.4}_{-4.3} \pm0.5$ $-15.2$ $43.6$
 1988 D
TASS
$-4.8 \pm6.5 \pm1.0$ $-11.5$ $39$
 1987 C
CELL
$-18.8 \pm4.5 \pm1.0$ $-15.5$ $44$
 1987 C
CELL
$+2.7 \pm4.9$ $-1.2$ $13.9$
 1986 C
$-11.1 \pm1.8 \pm1.0$ $-8.6$ $34.4$
 1986 C
$-17.3 \pm4.8 \pm1.0$ $-13.7$ $41.5$
 1986 C
$-22.8 \pm5.1 \pm1.0$ $-16.6$ $44.8$
 1986 C
$-6.3 \pm0.8 \pm0.2$ $-6.3$ $29$
 1985
MAC
$-4.9 \pm1.5 \pm0.5$ $-5.9$ $29$
 1985
HRS
$-7.1 \pm1.7$ $\text{-5.7}$ $29$
 1983
MRK2
$-16.1 \pm3.2$ $-9.2$ $34.2$
 1982 C
TASS
1  ABBIENDI 2001A error is almost entirely on account of statistics.
2  BARATE 2000C error is almost entirely on account of statistics.
3  ABREU 1995M perform this measurement using radiative muon-pair events associated with high-energy isolated photons.
4  ABE 1990I measurements in the range 50 ${}\leq{}$ $\sqrt {\mathit s }{}\leq{}$ $60.8$ GeV.
5  ABRAMS 1989D asymmetry includes both 9 ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ and 15 ${{\mathit \tau}^{+}}{{\mathit \tau}^{-}}$ events.
6  BACALA 1989 systematic error is about 5$\%$.
References:
 ABBIENDI 2001A
EPJ C19 587 Precise Determination of the ${{\mathit Z}}$ Resonance Parameters at LEP: Zedometry''
 ABREU 2000F
EPJ C16 371 Cross Sections and Leptonic Forward-Backward Asymmetries from the ${{\mathit Z}^{0}}$ Running of LEP
 ACCIARRI 2000C
EPJ C16 1 Measurements of Cross Sections and Forward Backward Asymmetries at the ${{\mathit Z}}$ Resonance and Determination of Electroweak Parameters
 BARATE 2000C
EPJ C14 1 Measurement of the ${{\mathit Z}}$ Resonance Parameters at LEP
 ABREU 1995M
ZPHY C65 603 A Study of Radiative Muon Pair Events at ${{\mathit Z}^{0}}$ Energies and Limits on an Additional ${{\mathit Z}^{\,'}}$} Gauge Boson
 ABE 1990I
ZPHY C48 13 Measurement of the Reactions ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ and ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \tau}^{+}}{{\mathit \tau}^{-}}$ between $\sqrt {s }$ = 50 and 60.8 GeV
 HEGNER 1990
ZPHY C46 547 Final Results on ${{\mathit \mu}}$ and ${{\mathit \tau}}$ Pair Production by the JADE Collaboration at PETRA
 ABRAMS 1989D
PRL 63 2780 Measurement of ${{\mathit Z}^{0}}$ Decays into Lepton Pairs
 BACALA 1989
PL B218 112 Measurement of Cross Sections and Charge Asymmetry for ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \tau}^{+}}{{\mathit \tau}^{-}}$ and ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ for $\sqrt {s }$ from 52 to 57 GeV
PL B208 319 Charge Asymmetry Measurement in ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ and ${{\mathit \tau}^{+}}{{\mathit \tau}^{-}}$ Reactions at $\sqrt {s }$ = 52 and 55 GeV
PR D38 2665 Electroweak Studies in ${{\mathit e}^{+}}{{\mathit e}^{-}}$ Collisions: 12 $<$ $\sqrt {s }$ $<$ 46.78 GeV
 BRAUNSCHWEIG 1988D
ZPHY C40 163 A Measurement of Muon Pair Production in ${{\mathit e}^{+}}{{\mathit e}^{-}}$ Annihilations at Centre of Mass Energies 35.0 ${}\leq{}$ $\sqrt {s }{}\leq{}$ 46.8 GeV
 BEHREND 1987C
PL B191 209 A Measurement of the Muon Pair Production in ${{\mathit e}^{+}}{{\mathit e}^{-}}$ Annihilation at 38.3 ${}\leq{}$ $\sqrt {s }{}\leq{}$ 46.8 GeV
 BARTEL 1986C
ZPHY C30 371 Tests of the Standard Model in Leptonic Reactions at PETRA Energies
 ASH 1985
PRL 55 1831 Precision Measurement of Electroweak Effects in ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ at $\sqrt {s }$ = 29 GeV
 DERRICK 1985
PR D31 2352 New Results on the Reaction ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ at $\sqrt {s }$ = 29 GeV
 LEVI 1983
PRL 51 1941 Weak Neutral Currents in ${{\mathit e}^{+}}{{\mathit e}^{-}}$ Collisions at $\sqrt {s }$ = 29 GeV
 BRANDELIK 1982C
PL 110B 173 Charge Asymmetry and Weak Interaction Effects in ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ and ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \tau}^{+}}{{\mathit \tau}^{-}}$
 LEP-SLC 2006
PRPL 427 257 Precision Electroweak Measurements on the ${{\mathit Z}}$ Resonance