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Determination of the leptonic branching ratios of the Z

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Determination of the leptonic branching ratios of the Z. / ALEPH Collaboration.
In: Physics Letters B, Vol. 234, No. 3, 1990, p. 399-408.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

ALEPH Collaboration 1990, 'Determination of the leptonic branching ratios of the Z', Physics Letters B, vol. 234, no. 3, pp. 399-408. https://doi.org/10.1016/0370-2693(90)91949-C

APA

ALEPH Collaboration (1990). Determination of the leptonic branching ratios of the Z. Physics Letters B, 234(3), 399-408. https://doi.org/10.1016/0370-2693(90)91949-C

Vancouver

ALEPH Collaboration. Determination of the leptonic branching ratios of the Z. Physics Letters B. 1990;234(3):399-408. doi: 10.1016/0370-2693(90)91949-C

Author

ALEPH Collaboration. / Determination of the leptonic branching ratios of the Z. In: Physics Letters B. 1990 ; Vol. 234, No. 3. pp. 399-408.

Bibtex

@article{dcd97ad22a81423185da3ccabca0d8db,
title = "Determination of the leptonic branching ratios of the Z",
abstract = "The ratios of the numbers of Z bosons decaying to e+e−, μ+μ− and τ+τ− pairs to the number decaying to hadrons have been measured. The branching ratios and partial widths for each channel were determined and found to be equal, consistent with lepton universality. The mean leptonic branching ratio was found to be 0.0321 ± 0.0013 and the leptonic partial width to be 85.4 ± 5.3 MeV. The partial widths for hadronic decays and for invisible decays were deduced to be 1833 ± 116 MeV and 569 ± 92 MeV, respectively. The number of light neutrino types, assuming only the standard model value for the ratio , was found to be 3.35 ± 0.41.",
author = "D. Decamp and Alexander Finch and {ALEPH Collaboration}",
year = "1990",
doi = "10.1016/0370-2693(90)91949-C",
language = "English",
volume = "234",
pages = "399--408",
journal = "Physics Letters B",
issn = "0370-2693",
publisher = "ELSEVIER SCIENCE BV",
number = "3",

}

RIS

TY - JOUR

T1 - Determination of the leptonic branching ratios of the Z

AU - Decamp, D.

AU - Finch, Alexander

AU - ALEPH Collaboration

PY - 1990

Y1 - 1990

N2 - The ratios of the numbers of Z bosons decaying to e+e−, μ+μ− and τ+τ− pairs to the number decaying to hadrons have been measured. The branching ratios and partial widths for each channel were determined and found to be equal, consistent with lepton universality. The mean leptonic branching ratio was found to be 0.0321 ± 0.0013 and the leptonic partial width to be 85.4 ± 5.3 MeV. The partial widths for hadronic decays and for invisible decays were deduced to be 1833 ± 116 MeV and 569 ± 92 MeV, respectively. The number of light neutrino types, assuming only the standard model value for the ratio , was found to be 3.35 ± 0.41.

AB - The ratios of the numbers of Z bosons decaying to e+e−, μ+μ− and τ+τ− pairs to the number decaying to hadrons have been measured. The branching ratios and partial widths for each channel were determined and found to be equal, consistent with lepton universality. The mean leptonic branching ratio was found to be 0.0321 ± 0.0013 and the leptonic partial width to be 85.4 ± 5.3 MeV. The partial widths for hadronic decays and for invisible decays were deduced to be 1833 ± 116 MeV and 569 ± 92 MeV, respectively. The number of light neutrino types, assuming only the standard model value for the ratio , was found to be 3.35 ± 0.41.

U2 - 10.1016/0370-2693(90)91949-C

DO - 10.1016/0370-2693(90)91949-C

M3 - Journal article

VL - 234

SP - 399

EP - 408

JO - Physics Letters B

JF - Physics Letters B

SN - 0370-2693

IS - 3

ER -