Forward - backward charge asymmetry of quark pairs produced at the KEK TRISTAN e+ e- collider

We report on a measurement of the forward-backward charge asymmetry in e+e−→qq¯ at KEK TRISTAN, where the asymmetry is near maximum. We sum over all flavors and measure the asymmetry by determining the charge of the quark jets. In addition we exploit flavor dependencies in the jet charge determination to enhance the contributions of certain flavors. This provides a check on the asymmetries of individual flavors. The measurement agrees with the standard model expectations.

electron positron: colliding beams
colliding beams: electron positron
electron positron: annihilation
annihilation: electron positron
quark: pair production
pair production: quark
charge: asymmetry
quark: jet
jet: charge
dependence: flavor

References(30)

Figures(0)

Forward - backward charge asymmetry in $e^+e^- \to$ hadron jets

AMY

Collaboration

•

D. Stuart
(
- UC, Davis
)

et al.

- Phys.Rev.Lett. 64 (1990) 983
•
DOI:
- 10.1103/PhysRevLett.64.983

Observation of Charge Asymmetry in Hadron Jets From $e^+ e^-$ Annihilation at $\sqrt{s}=29$ -{GeV}

et al.

- Phys.Rev.Lett. 58 (1987) 1080,
•
DOI:
- 10.1103/PhysRevLett.58.1080

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

JADE

Collaboration

•

T. Greenshaw
(
- Hamburg U.
)

et al.

- Z.Phys.C 42 (1989) 1
•
DOI:
- 10.1007/BF01565123

Charge Asymmetry of Hadron Jets and Limits on the Compositeness Scales in e $^{+}$ e^{-} \To q \Bar{$q$} Reaction at \Sqrt{$s$}=57.6-{GeV}

VENUS

Collaboration

•

K. Abe
(
- Tohoku U.
)

et al.

- Phys.Lett.B 232 (1989) 425-430
•
DOI:
- 10.1016/0370-2693(89)90768-5

Charge asymmetry of hadronic events in $e^{+} e^{-}$ annihilation at $\sqrt{s}$ = 57.9-GeV

TOPAZ

Collaboration

•

I. Adachi
(
- Nagoya U.
)

et al.

- Phys.Lett.B 255 (1991) 613-622
•
DOI:
- 10.1016/0370-2693(91)90277-W

A Measurement of sin**2 theta(W) from the charge asymmetry of hadronic events at the Z0 peak

DELPHI

Collaboration

•

P. Abreu
(
- LIP, Lisbon
)

et al.

- Phys.Lett.B 277 (1992) 371-382,
- Lepton/Photon Symp.1991:v.1:15-17
•
DOI:
- 10.1016/0370-2693(92)90760-2

A Measurement of the forward - backward charge asymmetry in hadronic decays of the Z0

OPAL

Collaboration

•

P.D. Acton
(
- Brunel U.
)

et al.

- Phys.Lett.B 294 (1992) 436-450
•
DOI:
- 10.1016/0370-2693(92)91546-L

Review of particle properties. Particle Data Group

et al.

- Phys.Rev.D 45 (1992) S1,
- Phys.Rev.D 46 (1992) 5210 (erratum)
•
DOI:
- 10.1103/PhysRevD.45.S1

A measurement of $e^+e^- \to b\bar{b}$ forward - backward charge asymmetry between $\sqrt{s} = 52$ GeV and 57-GeV

AMY

Collaboration

•

H. Sagawa
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 63 (1989) 2341
•
DOI:
- 10.1103/PhysRevLett.63.2341

Measurements of b quark forward - backward charge asymmetry and axial vector coupling using inclusive muons in e+ e- annihilation at s**(1/2) = 52-GeV - 61.4-Gev

TOPAZ

Collaboration

•

A. Shimonaka
(
- Osaka City U.
)

et al.

- Phys.Lett.B 268 (1991) 457-464
•
DOI:
- 10.1016/0370-2693(91)91608-X

Measurement of forward - backward charge asymmetry in the process of b quark production in e+ e- annihilation around s**(1/2) = 60-GeV

VENUS

Collaboration

•

M. Shirakata
(
- Tsukuba U.
)

et al.

- Phys.Lett.B 278 (1992) 499-505
•
DOI:
- 10.1016/0370-2693(92)90592-R

Measurement of the forward - backward asymmetry in Z ---> b anti-b and Z ---> c anti-c

ALEPH

Collaboration

•

D. Decamp
(
- Annecy, LAPP
)

et al.

- Phys.Lett.B 263 (1991) 325-336
•
DOI:
- 10.1016/0370-2693(91)90607-R

A Measurement of the b anti-b forward backward asymmetry using the semileptonic decay into muons

DELPHI

Collaboration

•

P. Abreu
(
- LIP, Lisbon
)

et al.

- Phys.Lett.B 276 (1992) 536-546
•
DOI:
- 10.1016/0370-2693(92)91680-8

A Measurement of the Z0 ---> b anti-b forward - backward asymmetry

L3

Collaboration

•

B. Adeva
(
- CERN
)

et al.

- Phys.Lett.B 252 (1990) 713-721
•
DOI:
- 10.1016/0370-2693(90)90510-D

Measurement of the Asymmetry of b Quark Production in e $^{+}$ e $^{-}$ Annihilation of \Sqrt{$s$}=35-{GeV}

TASSO

Collaboration

•

W. Braunschweig
(
- Aachen, Tech. Hochsch.
)

et al.

- Z.Phys.C 48 (1990) 433-444
•
DOI:
- 10.1007/BF01572023

A Measurement of the $e^+ e^- \to b \bar{b}$ Forward - Backward Charge Asymmetry at $\sqrt{s}=29$ -{GeV}

MAC

Collaboration

•

H.R. Band
(
- Colorado U. and
- Frascati and
- Houston U. and
- Northeastern U. and
- SLAC and
- Utah U. and
- Wisconsin U., Madison
)

et al.

- Phys.Lett.B 218 (1989) 369-373
•
DOI:
- 10.1016/0370-2693(89)91599-2

A Measurement of the Electroweak Induced Charge Asymmetry in e+ e- ---> B anti-B

JADE

Collaboration

•

W. Bartel
(
- DESY
)

et al.

- Phys.Lett.B 146 (1984) 437-442
•
DOI:
- 10.1016/0370-2693(84)90156-4

Experimental Studies on Multi-Jet Production in e+ e- Annihilation at PETRA Energies

JADE

Collaboration

•

W. Bartel
(
- DESY
)

et al.

- Z.Phys.C 33 (1986) 23,
•
DOI:
- 10.1007/BF01410449

The Lund Monte Carlo for Jet Fragmentation

Torbjorn Sjostrand
(
- Lund U., Dept. Theor. Phys.
)

- Comput.Phys.Commun. 27 (1982) 243,
- Comput. Phys. Commun. 27 ( 1982) 243-284 and Lund Univ. - LU TP 82-03 (82,REC.MAY) 74p
•
DOI:
- 10.1016/0010-4655(82)90175-8

The Lund Monte Carlo for Jet Fragmentation and e+ e- Physics. Jetset Version 6.3: An Update

- Comput.Phys.Commun. 43 (1987) 367
•
DOI:
- 10.1016/0010-4655(87)90054-3

A Parametrization of the Properties of Quark Jets

R.D. Field
(
- Caltech
)
,
R.P. Feynman
(
- Caltech
)

- Nucl.Phys.B 136 (1978) 1,
•
DOI:
- 10.1016/0550-3213(78)90015-9

Parton Fragmentation and String Dynamics

- Phys.Rept. 97 (1983) 31-145
•
DOI:
- 10.1016/0370-1573(83)90080-7

Status of Fragmentation Models

Torbjorn Sjostrand
(
- Lund U., Dept. Theor. Phys.
)

- Int.J.Mod.Phys.A 3 (1988) 751
•
DOI:
- 10.1142/S0217751X88000345

Radiative corrections to $e^{+} e^{-}$ reactions in electroweak theory

J. Fujimoto
(
- Nagoya U.
)
,
M. Igarashi
(
- Tokai U., Hiratsuka
)
,
N. Nakazawa
(
- Kogakuin U.
)
,
Y. Shimizu
(
- KEK, Tsukuba
)
,
K. Tobimatsu
(
- Tsukuba Inst. Sci. Tech.
)

- Prog.Theor.Phys.Suppl. 100 (1990) 1-379
•
DOI:
- 10.1143/PTPS.100.1

Radiative Correction to Jet Production in $e^+ e^-$ Annihilation

- Prog.Theor.Phys. 79 (1988) 701
•
DOI:
- 10.1143/PTP.79.701

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