Heavy Quark Charge Asymmetries With the Cello Detector

The production ofb andc quarks ine+e− annihilation has been studied with the CELLO detector in the range from 35 GeV up to the highest PETRA energies. The heavy quarks have been tagged by their semileptonic decays. The charge asymmetries forb quarks at 35 and 43 GeV have been found to beAb=−(22.2±8.1)% andAb=−(49.1±16.5)%, respectively, using a method incorporating jet variables and their correlations for the separation of the heavy quarks from the back ground of the lighter quarks. Forc quarks we obtainAc=−(12.9±8.8)% andAc=+(7.7±14.0)%, respectively. The axial vector coupling constants of the heavy quarksc andb are found to beac=+(0.29±0.46) andab=−(1.15±0.41) taking

B^0 \overline {B^0 }

mixing into account. The results are in agreement with the expectations from the standard model.

electron positron: colliding beams
colliding beams: electron positron
electron positron: annihilation
annihilation: electron positron
charm
bottom
quark: pair production
pair production: quark
quark: semileptonic decay
semileptonic decay: quark

References(32)

Figures(0)

CELLO: A NEW DETECTOR AT PETRA

CELLO

Collaboration

•

Mina-Jacqueline Schachter
(
- Munich, Max Planck Inst.
)

et al.

- Phys.Scripta 23 (1981) 610-622
•
DOI:
- 10.1088/0031-8949/23/4B/003

A Search for Hadronic Events With Low Thrust and an Isolated Lepton

CELLO

Collaboration

•

H.J. Behrend
(
- DESY
)

et al.

- Phys.Lett.B 193 (1987) 157-162
•
DOI:
- 10.1016/0370-2693(87)90475-8

Production Cross-section and Electroweak Asymmetry of $D^*$ and $D$ Mesons Produced in $e^+ e^-$ Annihilations at 29-{GeV}

et al.

- Phys.Lett.B 206 (1988) 551-556
•
DOI:
- 10.1016/0370-2693(88)91628-0

Prompt muon production in $e^+e^-$ annihilations at 29-GeV

TPC/Two Gamma

Collaboration

•

H. Aihara

et al.

- Phys.Rev.D 31 (1985) 2719
•
DOI:
- 10.1103/PhysRevD.31.2719

Prompt electron production in $e^+e^-$ annihilations at 29-GeV

TPC/Two Gamma

Collaboration

•

H. Aihara

et al.

- Z.Phys.C 27 (1985) 39,
- Z. Phys. C27 ( 1985) 39-42 and Tokyo Univ. - UT-HE-84-03 (84,REC.MAY) 11p
•
DOI:
- 10.1007/BF01642478

Charged $D^*$ meson production in $e^+e^-$ annihilation at $\sqrt{s}=29$ GeV

TPC/Two Gamma

Collaboration

•

H. Aihara

et al.

- Phys.Rev.D 34 (1986) 1945
•
DOI:
- 10.1103/PhysRevD.34.1945

Charged $D^*$ Production in $e^+ e^-$ Annihilation

JADE

Collaboration

•

W. Bartel
(
- DESY
)

et al.

- Phys.Lett.B 146 (1984) 121-125
•
DOI:
- 10.1016/0370-2693(84)90656-7

- Phys.Rept. 109 133

Inclusive Electron Production From Heavy Quarks in $e^+ e^-$ Annihilation at 34.6-{GeV} Center-of-mass Energy

TASSO

Collaboration

•

M. Althoff
(
- Aachen, Tech. Hochsch.
)

et al.

- Phys.Lett.B 146 (1984) 443-449,
- Phys. Lett. B146 (1984) 443-449 and Hamburg Desy - DESY 84-061 (84,REC.JUL.) 16p
•
DOI:
- 10.1016/0370-2693(84)90157-6

Production and Muonic Decay of Heavy Quarks in e+ e- Annihilation at 34.5-GeV

TASSO

Collaboration

•

M. Althoff
(
- Aachen, Tech. Hochsch.
)

et al.

- Z.Phys.C 22 (1984) 219
•
DOI:
- 10.1007/BF01575783

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

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

- Z.Phys.C 26 26

Parton Fragmentation and String Dynamics

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

A General Model for Jet Fragmentation

- Z.Phys.C 20 (1983) 317
•
DOI:
- 10.1007/BF01407824

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 e+ e- Jet Physics

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

- Comput.Phys.Commun. 28 (1983) 229,
- Comput. Phys. Commun. 28 ( 1983) 229-254 and Lund Univ. - LU TP 82-07 (82,REC.JUL.) 42p
•
DOI:
- 10.1016/0010-4655(83)90041-3

Prompt Electron Production in $e^+ e^-$ Annihilation at 29-{GeV}

DELCO

Collaboration

•

D.E. Koop
(
- Caltech and
- SLAC and
- Stanford U., Phys. Dept.
)

et al.

- Phys.Rev.Lett. 52 (1984) 970,
- Phys. Rev. Lett. 52 (1984) 970-973 and SLAC Stanford - SLAC-PUB-3266 (83,REC.JAN.84) 14p
•
DOI:
- 10.1103/PhysRevLett.52.970

Fragmentation of Heavy Quarks Produced in $e^+ e^-$ Annihilation

et al.

- Phys.Rev.Lett. 50 (1983) 2054
•
DOI:
- 10.1103/PhysRevLett.50.2054

Inclusive electron Production in e+ e- Annihilation at 29-GeV

et al.

- Phys.Rev.Lett. 50 (1983) 1542
•
DOI:
- 10.1103/PhysRevLett.50.1542

Inclusive Lepton Production in $e^+ e^-$ Annihilation at 29-{GeV}

et al.

- Phys.Rev.Lett. 60 (1988) 2587
•
DOI:
- 10.1103/PhysRevLett.60.2587

Determination of Semimuonic Branching Ratios and Fragmentation Functions of Heavy Quarks in $e^+ e^-$ Annihilation at $s^$ (1.2) = 34.6-{GeV}

JADE

Collaboration

•

W. Bartel
(
- DESY
)

et al.

- Z.Phys.C 33 (1987) 339
•
DOI:
- 10.1007/BF01552539

Experimental Study of Inclusive Muon Spectra at PETRA

Aachen-DESY-Annecy(LAPP)-MIT-NIKHEF-Beijing

Collaboration

•

B. Adeva

et al.

- Phys.Rev.Lett. 51 (1983) 443,
- Phys. Rev. Lett. 51 (1983) 443-446 and Hamburg Desy - DESY 83-029 (83,REC.APR.) 12 P. (304530)
•
DOI:
- 10.1103/PhysRevLett.51.443

- Nucl.Phys.B 202 6

Standard Model Electroweak Radiative Corrections to Longitudinal Polarization Asymmetry A(Pol) and Forward-Backward Asymmetry A(FB) in e+ e- ---> mu+ mu- on and off the Z0 Resonance

B.W. Lynn
(
- Oxford U.
)
,
R.G. Stuart
(
- Oxford U.
)

- Nucl.Phys.B 253 (1985) 216-230
•
DOI:
- 10.1016/0550-3213(85)90528-0

1-25 of 32
1
2
25 / page