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Z production cross-sections and lepton pair forward-backward asymmetries

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Z production cross-sections and lepton pair forward-backward asymmetries. / ALEPH Collaboration.

In: Zeitschrift für Physik C Particles and Fields, Vol. 62, No. 4, 1994, p. 539-550.

Research output: Contribution to journalJournal articlepeer-review

Harvard

ALEPH Collaboration 1994, 'Z production cross-sections and lepton pair forward-backward asymmetries', Zeitschrift für Physik C Particles and Fields, vol. 62, no. 4, pp. 539-550. https://doi.org/10.1007/BF01574159

APA

ALEPH Collaboration (1994). Z production cross-sections and lepton pair forward-backward asymmetries. Zeitschrift für Physik C Particles and Fields, 62(4), 539-550. https://doi.org/10.1007/BF01574159

Vancouver

ALEPH Collaboration. Z production cross-sections and lepton pair forward-backward asymmetries. Zeitschrift für Physik C Particles and Fields. 1994;62(4):539-550. https://doi.org/10.1007/BF01574159

Author

ALEPH Collaboration. / Z production cross-sections and lepton pair forward-backward asymmetries. In: Zeitschrift für Physik C Particles and Fields. 1994 ; Vol. 62, No. 4. pp. 539-550.

Bibtex

@article{511aedff31fc424787ddcf42c4d5f1dc,
title = "Z production cross-sections and lepton pair forward-backward asymmetries",
abstract = "Precise values of theZ resonance cross sections and lepton pair forward-backward asymmetries are measured from a sample of 1.3 millionZ decays into hadrons and charged leptons taken with the ALEPH detector at LEP. A silicon-tungsten luminosity calorimeter was installed in ALEPH in 1992, permitting the determination of the absolute luminosity to a systematic precision of 0.15% (experimental) and 0.25% (theoretical). This is combined with a better understanding of the hadronic event selection and an improved tau pair selection. Including the ALEPH results of the past three years one obtains σh0 =(41.60±0.16) nb, andRl=20.69±0.09. The corresponding number of light neutrino species isNv =2.983±0.034. The lepton pair forward-backward asymmetry is used to derive the ratio of vector to axial-vector couplings of leptons:gV2(MZ2)/gA2(MZ2)=0.0058 ±0.0011. An application of these results to constrain one model with extraZ bosons is presented.",
author = "D. Buskulic and Alexander Finch and {ALEPH Collaboration}",
year = "1994",
doi = "10.1007/BF01574159",
language = "English",
volume = "62",
pages = "539--550",
journal = "Zeitschrift f{\"u}r Physik C Particles and Fields",
issn = "0170-9739",
publisher = "Springer Verlag",
number = "4",

}

RIS

TY - JOUR

T1 - Z production cross-sections and lepton pair forward-backward asymmetries

AU - Buskulic, D.

AU - Finch, Alexander

AU - ALEPH Collaboration

PY - 1994

Y1 - 1994

N2 - Precise values of theZ resonance cross sections and lepton pair forward-backward asymmetries are measured from a sample of 1.3 millionZ decays into hadrons and charged leptons taken with the ALEPH detector at LEP. A silicon-tungsten luminosity calorimeter was installed in ALEPH in 1992, permitting the determination of the absolute luminosity to a systematic precision of 0.15% (experimental) and 0.25% (theoretical). This is combined with a better understanding of the hadronic event selection and an improved tau pair selection. Including the ALEPH results of the past three years one obtains σh0 =(41.60±0.16) nb, andRl=20.69±0.09. The corresponding number of light neutrino species isNv =2.983±0.034. The lepton pair forward-backward asymmetry is used to derive the ratio of vector to axial-vector couplings of leptons:gV2(MZ2)/gA2(MZ2)=0.0058 ±0.0011. An application of these results to constrain one model with extraZ bosons is presented.

AB - Precise values of theZ resonance cross sections and lepton pair forward-backward asymmetries are measured from a sample of 1.3 millionZ decays into hadrons and charged leptons taken with the ALEPH detector at LEP. A silicon-tungsten luminosity calorimeter was installed in ALEPH in 1992, permitting the determination of the absolute luminosity to a systematic precision of 0.15% (experimental) and 0.25% (theoretical). This is combined with a better understanding of the hadronic event selection and an improved tau pair selection. Including the ALEPH results of the past three years one obtains σh0 =(41.60±0.16) nb, andRl=20.69±0.09. The corresponding number of light neutrino species isNv =2.983±0.034. The lepton pair forward-backward asymmetry is used to derive the ratio of vector to axial-vector couplings of leptons:gV2(MZ2)/gA2(MZ2)=0.0058 ±0.0011. An application of these results to constrain one model with extraZ bosons is presented.

U2 - 10.1007/BF01574159

DO - 10.1007/BF01574159

M3 - Journal article

VL - 62

SP - 539

EP - 550

JO - Zeitschrift für Physik C Particles and Fields

JF - Zeitschrift für Physik C Particles and Fields

SN - 0170-9739

IS - 4

ER -