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

OUR FIT, which is obtained by a simultaneous fit to several ${{\mathit c}}$- and ${{\mathit b}}$-quark measurements as explained in the note The ${{\mathit Z}}$ boson'' and ref. LEP-SLC 2006 , refers to the $\mathbf {{{\mathit Z}} pole}$ asymmetry. The experimental values, on the other hand, correspond to the measurements carried out at the respective energies.
ASYMMETRY ${\mathrm {(\%)}}$ STD. MODEL $\sqrt {\mathit s }$ ${\mathrm {(GeV)}}$ DOCUMENT ID TECN
$\bf{ 7.07 \pm0.35}$ OUR FIT
$6.31 \pm0.93 \pm0.65$ $6.35$ $91.26$ 1
 2004 F
DLPH
$5.68 \pm0.54 \pm0.39$ $6.3$ $91.25$ 2
 2003 P
OPAL
$6.45 \pm0.57 \pm0.37$ $6.10$ $91.21$ 3
 2002 H
ALEP
$6.59 \pm0.94 \pm0.35$ $6.2$ $91.235$ 4
 1999 Y
DLPH
$6.3 \pm0.9 \pm0.3$ $6.1$ $91.22$ 5
 1998 O
ALEP
$6.3 \pm1.2 \pm0.6$ $6.1$ $91.22$ 6
 1997 C
OPAL
$8.3 \pm3.8 \pm2.7$ $6.2$ $91.24$ 7
 1992 D
L3
• • • We do not use the following data for averages, fits, limits, etc. • • •
$3.1 \pm3.5 \pm0.5$ $-3.5$ $89.43$ 1
 2004 F
DLPH
$11.0 \pm2.8 \pm0.7$ $12.3$ $92.99$ 1
 2004 F
DLPH
$-6.8 \pm2.5 \pm0.9$ $-3.0$ $89.51$ 2
 2003 P
OPAL
$14.6 \pm2.0 \pm0.8$ $12.2$ $92.95$ 2
 2003 P
OPAL
$-12.4 \pm15.9 \pm2.0$ $-9.6$ $88.38$ 3
 2002 H
ALEP
$-2.3 \pm2.6 \pm0.2$ $-3.8$ $89.38$ 3
 2002 H
ALEP
$-0.3 \pm8.3 \pm0.6$ $0.9$ $90.21$ 3
 2002 H
ALEP
$10.6 \pm7.7 \pm0.7$ $9.6$ $92.05$ 3
 2002 H
ALEP
$11.9 \pm2.1 \pm0.6$ $12.2$ $92.94$ 3
 2002 H
ALEP
$12.1 \pm11.0 \pm1.0$ $14.2$ $93.90$ 3
 2002 H
ALEP
$-4.96 \pm3.68 \pm0.53$ $-3.5$ $89.434$ 4
 1999 Y
DLPH
$11.80 \pm3.18 \pm0.62$ $12.3$ $92.990$ 4
 1999 Y
DLPH
$-1.0 \pm4.3 \pm1.0$ $-3.9$ $89.37$ 5
 1998 O
ALEP
$11.0 \pm3.3 \pm0.8$ $12.3$ $92.96$ 5
 1998 O
ALEP
$3.9 \pm5.1 \pm0.9$ $-3.4$ $89.45$ 6
 1997 C
OPAL
$15.8 \pm4.1 \pm1.1$ $12.4$ $93.00$ 6
 1997 C
OPAL
$-12.9 \pm7.8 \pm5.5$ $-13.6$ $35$
 1990 D
CELL
$7.7 \pm13.4 \pm5.0$ $-22.1$ $43$
 1990 D
CELL
$-12.8 \pm4.4 \pm4.1$ $-13.6$ $35$
 1990
$-10.9 \pm12.9 \pm4.6$ $-23.2$ $44$
 1990
$-14.9 \pm6.7$ $-13.3$ $35$
 1989
1  ABDALLAH 2004F tag ${{\mathit b}}-$ and ${{\mathit c}}-$quarks using semileptonic decays combined with charge flow information from the hemisphere opposite to the lepton. Enriched samples of ${{\mathit c}}{{\overline{\mathit c}}}$ and ${{\mathit b}}{{\overline{\mathit b}}}$ events are obtained using lifetime information.
2  ABBIENDI 2003P tag heavy flavors using events with one or two identified leptons. This allows the simultaneous fitting of the ${{\mathit b}}$ and ${{\mathit c}}~$quark forward-backward asymmetries as well as the average ${{\mathit B}^{0}}-{{\overline{\mathit B}}^{0}}$ mixing.
3  HEISTER 2002H measure simultaneously ${{\mathit b}}$ and ${{\mathit c}}$ quark forward-backward asymmetries using their semileptonic decays to tag the quark charge. The flavor separation is obtained with a discriminating multivariate analysis.
4  ABREU 1999Y tag ${{\mathit Z}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}$ and ${{\mathit Z}}$ $\rightarrow$ ${{\mathit c}}{{\overline{\mathit c}}}$ events by an exclusive reconstruction of several ${{\mathit D}}~$ meson decay modes ( ${{\mathit D}^{*+}}$ , ${{\mathit D}^{0}}$, and ${{\mathit D}^{+}}$ with their charge-conjugate states).
5  BARATE 1998O tag ${{\mathit Z}}$ $\rightarrow$ ${{\mathit c}}{{\overline{\mathit c}}}$ events requiring the presence of high-momentum reconstructed ${{\mathit D}^{*+}}$, ${{\mathit D}^{+}}$, or ${{\mathit D}^{0}}$ mesons.
6  ALEXANDER 1997C identify the ${\mathit {\mathit b}}$ and ${\mathit {\mathit c}}$ events using a ${{\mathit D}}/{{\mathit D}^{*}}$ tag.
7  ADRIANI 1992D use both electron and muon semileptonic decays.
References:
 ABDALLAH 2004F
EPJ C34 109 Measurement of the Forward Backward Asymmetries of ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit Z}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}$ and ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit Z}}$ $\rightarrow$ ${{\mathit c}}{{\overline{\mathit c}}}$ using Prompt Leptons
 ABBIENDI 2003P
PL B577 18 Measurement of Heavy Quark Forward Backward Asymmetries and Average ${{\mathit B}}$ Mixing using Leptons in Hadronic ${{\mathit Z}}$ Decays
 HEISTER 2002H
EPJ C24 177 Measurement of the Forward-Backward Asymmetry in ${{\mathit Z}}$ $\rightarrow$ ${\mathit {\mathit b}}$ ${\mathit {\overline{\mathit b}}}$ and ${{\mathit Z}}$ $\rightarrow$ ${\mathit {\mathit c}}$ ${\mathit {\overline{\mathit c}}}$
 ABREU 1999Y
EPJ C10 219 Measurement of the Forward Backward Asymmetry of ${\mathit {\mathit c}}$ and ${\mathit {\mathit b}}$ Quarks at the ${{\mathit Z}}$ Pole using Reconstructed ${{\mathit D}}$ Mesons
 BARATE 1998O
PL B434 415 The Forward-Backward Asymmetry for Charm Quarks at the ${{\mathit Z}}$
 ALEXANDER 1997C
ZPHY C73 379 A Measurement of the Charm and Bottom Forward Backward Asymmetries using ${{\mathit D}}$ Mesons at LEP
PL B292 454 Measurement of the ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${\mathit {\mathit b}}$ ${\mathit {\overline{\mathit b}}}$ and ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${\mathit {\mathit c}}$ ${\mathit {\overline{\mathit c}}}$ Forward Backward Asymmetries at the ${{\mathit Z}^{0}}$ Resonance
ZPHY C46 349 A Measurement of the Weak Axial Couplings of the ${\mathit {\mathit b}}$ and ${\mathit {\mathit c}}$ Quarks
ZPHY C44 567 A Measurement of the Charmed Quark Asymmetry in ${{\mathit e}^{+}}{{\mathit e}^{-}}$ Annihilation
PRPL 427 257 Precision Electroweak Measurements on the ${{\mathit Z}}$ Resonance