Measurement of electroweak parameters from hadronic and leptonic decays of the $Z^0$ - INSPIRE

DataBETA

Measurement of electroweak parameters from hadronic and leptonic decays of the $Z^0$

L3

Collaboration

Feb, 1991

81 pages

Published in:

Z.Phys.C 51 (1991) 179-204

DOI:

10.1007/BF01475788

Report number:

L3-028

Experiments:

CERN-LEP-L3

View in:

CERN Document Server

reference search215 citations

Citations per year

Abstract: (Springer)

From the measured ratio of the invisible and the leptonic decay widths of theZ0, we determine the number of light neutrino species to beNv=3.05±0.10. We include our measurements of the forward-backward asymmetry for the leptonic channels in a fit to determine the vector and axial-vector neutral current coupling constants of charged leptons to theZ0. We obtain

\bar g_V=- 0.046_{ - 0.012}^{ + 0.015}

and

\bar g_A=- 0.500 \pm 0.003

. In the framework of the Standard Model, we estimate the top quark mass to bemt=193−69+52±16 (Higgs) GeV, and we derive a value for the weak mixing angle of sin2θW=1−(MW/MZ)2=0.222 ± 0.008, corresponding to an effective weak mixing angle of

\sin ^2 \bar \theta _W= 0.2315\pm0.0025

.

electron positron: colliding beams
colliding beams: electron positron
electron positron: annihilation
annihilation: electron positron
Z0: electroproduction
electroproduction: Z0
Z0: leptonic decay
leptonic decay: Z0
Z0: nonleptonic decay
nonleptonic decay: Z0

References(55)

Figures(0)

Partial Symmetries of Weak Interactions

S.L. Glashow
(
- Copenhagen U.
)

- Nucl.Phys. 22 (1961) 579-588,
- Also in *Lai, C. H. (Ed.): Gauge Theory Of Weak and Electromagnetic Interactions*, 171-180
•
DOI:
- 10.1016/0029-5582(61)90469-2

A Model of Leptons

Steven Weinberg
(
- MIT, LNS
)

- Phys.Rev.Lett. 19 (1967) 1264-1266,
- Also in *Lichtenberg, D. B. (ed.), Rosen, S. P. (ed.): Developments In The Quark Theory Of Hadrons, Vol. 1*, 157-159,
- In *Lai, C. H. (ed.): Gauge Theory Of Weak and Electromagnetic Interactions*, 185-187,
- In *Rosner, J. L. (ed.): New Particles*, 26-28
•
DOI:
- 10.1103/PhysRevLett.19.1264

Weak and Electromagnetic Interactions

Abdus Salam
(
- Imperial Coll., London and
- ICTP, Trieste
)

- Conf.Proc.C 680519 (1968) 367-377,
- Reprinted in *Lichtenberg, D. B. (ed.), Rosen, S. P. (ed.): Developments In The Quark Theory Of Hadrons, Vol. 1*, 160-170, and in *Lai, C. H. (ed.): Gauge Theory Of Weak and Electromagnetic Interactions*, 188-198,
- Also in *Rosner, J.L. (ed.): New particles* 29-39,
- Also in *Ali, A. (ed.) et al.: Selected papers of Abdus Salam* 244-254
•
DOI:
- 10.1142/9789812795915_0034

A Determination of the Properties of the Neutral Intermediate Vector Boson $Z^0$

L3

Collaboration

•

B. Adeva
(
- CERN
)

et al.

- Phys.Lett.B 231 (1989) 509
•
DOI:
- 10.1016/0370-2693(89)90703-X

Measurement of $g$ (a) and $g(V$ ), the Neutral Current Coupling Constants to Leptons

L3

Collaboration

•

B. Adeva
(
- CERN
)

et al.

- Phys.Lett.B 236 (1990) 109-115
•
DOI:
- 10.1016/0370-2693(90)90603-4

Measurement of $\Z^0$ Decays to Hadrons and a Precise Determination of the Number of Neutrino Species

L3

Collaboration

•

B. Adeva
(
- CERN
)

et al.

- Phys.Lett.B 237 (1990) 136-146
•
DOI:
- 10.1016/0370-2693(90)90476-M

A Measurement of the $\Z^0$ Leptonic Partial Widths and the Vector and Axial Vector Coupling Constants.

L3

Collaboration

•

B. Adeva
(
- CERN
)

et al.

- Phys.Lett.B 238 (1990) 122-130
•
DOI:
- 10.1016/0370-2693(90)92111-U

A Determination of electroweak parameters from Z0 ---> mu+ mu- (gamma)

L3

Collaboration

•

B. Adeva
(
- CERN
)

et al.

- Phys.Lett.B 247 (1990) 473-480
•
DOI:
- 10.1016/0370-2693(90)90926-W

A Precision measurement of the number of neutrino species

L3

Collaboration

•

B. Adeva
(
- CERN
)

et al.

- Phys.Lett.B 249 (1990) 341-352
•
DOI:
- 10.1016/0370-2693(90)91267-F

A Determination of electroweak parameters from Z0 decays into charged leptons

L3

Collaboration

•

B. Adeva
(
- CERN
)

et al.

- Phys.Lett.B 250 (1990) 183-192
•
DOI:
- 10.1016/0370-2693(90)91175-B

Determination of the Number of Light Neutrino Species

ALEPH

Collaboration

•

D. Decamp
(
- Annecy, LAPP
)

et al.

- Phys.Lett.B 231 (1989) 519-529
•
DOI:
- 10.1016/0370-2693(89)90704-1

Determination of the Leptonic Branching Ratios of the $Z$

ALEPH

Collaboration

•

D. Decamp
(
- Annecy, LAPP
)

et al.

- Phys.Lett.B 234 (1990) 399-408
•
DOI:
- 10.1016/0370-2693(90)91949-C

A Precise Determination of the Number of Families With Light Neutrinos and of the $Z$ Boson Partial Widths

ALEPH

Collaboration

•

D. Decamp
(
- Annecy, LAPP
)

et al.

- Phys.Lett.B 235 (1990) 399-411
•
DOI:
- 10.1016/0370-2693(90)91984-J

Measurement of electroweak parameters from Z decays into Fermion pairs

ALEPH

Collaboration

•

D. Decamp
(
- Annecy, LAPP
)

et al.

- Z.Phys.C 48 (1990) 365-392
•
DOI:
- 10.1007/BF01572019

Measurement of the Mass and Width of the $Z^0$ Particle from Multi - Hadronic Final States Produced in $e^{+} e^{-}$ Annihilations

DELPHI

Collaboration

•

P. Aarnio
(
- Helsinki U.
)

et al.

- Phys.Lett.B 231 (1989) 539-547
•
DOI:
- 10.1016/0370-2693(89)90706-5

Study of the Leptonic Decays of the $Z^0$ Boson

DELPHI

Collaboration

•

P. Aarnio
(
- Helsinki U.
)

et al.

- Phys.Lett.B 241 (1990) 425-434
•
DOI:
- 10.1016/0370-2693(90)91667-Z

Measurement of the $Z^0$ Mass and Width with the OPAL Detector at LEP

OPAL

Collaboration

•

M.Z. Akrawy
(
- Queen Mary, U. of London
)

et al.

- Phys.Lett.B 231 (1989) 530-538
•
DOI:
- 10.1016/0370-2693(89)90705-3

Measurement of the Decay of the $\Z^0$ Into Lepton Pairs

OPAL

Collaboration

•

M.Z. Akrawy
(
- Queen Mary, U. of London
)

et al.

- Phys.Lett.B 235 (1990) 379-388
•
DOI:
- 10.1016/0370-2693(90)91982-H

A Combined Analysis of the Hadronic and Leptonic Decays of the $\Z^0$

OPAL

Collaboration

•

M.Z. Akrawy
(
- Queen Mary, U. of London
)

et al.

- Phys.Lett.B 240 (1990) 497-512
•
DOI:
- 10.1016/0370-2693(90)91137-Z

Analysis of Z0 couplings to charged leptons

OPAL

Collaboration

•

M.Z. Akrawy
(
- Queen Mary, U. of London
)

et al.

- Phys.Lett.B 247 (1990) 458-472
•
DOI:
- 10.1016/0370-2693(90)90925-V

The Construction of the L3 Experiment

L3

Collaboration

•

B. Adeva
(
- CERN
)

et al.

- Nucl.Instrum.Meth.A 289 (1990) 35-102
•
DOI:
- 10.1016/0168-9002(90)90250-A

Radiative Corrections to Bhabha Scattering at High-Energies. 1. Virtual and Soft Photon Corrections

- Nucl.Phys.B 304 (1988) 687-711
•
DOI:
- 10.1016/0550-3213(88)90650-5

Radiative Corrections to Bhabha Scattering at High-Energies. 2. Hard Photon Corrections and Monte Carlo Treatment

- Nucl.Phys.B 304 (1988) 712-748
•
DOI:
- 10.1016/0550-3213(88)90651-7

Multi - Photon Monte Carlo for Bhabha Scattering at Low Angles

Stanislaw Jadach
(
- Jagiellonian U. and
- CERN and
- SLAC
)
,
B.F.L. Ward
(
- Tennessee U. and
- SLAC
)

- Phys.Rev.D 40 (1989) 3582-3589
•
DOI:
- 10.1103/PhysRevD.40.3582

Distributions for electron-Positron Annihilation Into Two and Three Photons

Frits A. Berends
(
- Leiden U. and
- DESY
)
,
R. Kleiss
(
- Leiden U. and
- DESY
)

- Nucl.Phys.B 186 (1981) 22-34
•
DOI:
- 10.1016/0550-3213(81)90090-0

1-25 of 55
1
2
3
25 / page