Determination of the number of light neutrino species

Physics

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https://doi.org/10.1016/0370-2693(89)90704-1
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Determination of the number of light neutrino species. / ALEPH Collaboration.
In: Physics Letters B, Vol. 231, No. 4, 1989, p. 519-529.

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

Harvard

ALEPH Collaboration 1989, 'Determination of the number of light neutrino species', Physics Letters B, vol. 231, no. 4, pp. 519-529. https://doi.org/10.1016/0370-2693(89)90704-1

APA

ALEPH Collaboration (1989). Determination of the number of light neutrino species. Physics Letters B, 231(4), 519-529. https://doi.org/10.1016/0370-2693(89)90704-1

Vancouver

ALEPH Collaboration. Determination of the number of light neutrino species. Physics Letters B. 1989;231(4):519-529. doi: 10.1016/0370-2693(89)90704-1

Author

ALEPH Collaboration. / Determination of the number of light neutrino species. In: Physics Letters B. 1989 ; Vol. 231, No. 4. pp. 519-529.

Bibtex

@article{2a0c70f8019442f1b45b207e1031d150,

title = "Determination of the number of light neutrino species",

abstract = "The cross-section for e+e− → hadrons in the vicinity of the Z boson peak has been measured with the ALEPH detector at the CERN Large Electron Positron collider, LEP. Measurements of the Z mass, Mz = (91.174±0.070) GeV, the Z width Γz=(2.68±0.15) GeV, and of the peak hadronic cross-section, σhadpeak=(29.3±1.2) nb, are presented. With the constraints of the standard electroweak model, the number of light neutrino species is found to be Nv=3.27±0.30. this results rules out of the possibility of a fourth type of light neutrino at 98% CL.",

author = "D. Decamp and Alexander Finch and {ALEPH Collaboration}",

year = "1989",

doi = "10.1016/0370-2693(89)90704-1",

language = "English",

volume = "231",

pages = "519--529",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "ELSEVIER SCIENCE BV",

number = "4",

}

RIS

TY - JOUR

T1 - Determination of the number of light neutrino species

AU - Decamp, D.

AU - Finch, Alexander

AU - ALEPH Collaboration

PY - 1989

Y1 - 1989

N2 - The cross-section for e+e− → hadrons in the vicinity of the Z boson peak has been measured with the ALEPH detector at the CERN Large Electron Positron collider, LEP. Measurements of the Z mass, Mz = (91.174±0.070) GeV, the Z width Γz=(2.68±0.15) GeV, and of the peak hadronic cross-section, σhadpeak=(29.3±1.2) nb, are presented. With the constraints of the standard electroweak model, the number of light neutrino species is found to be Nv=3.27±0.30. this results rules out of the possibility of a fourth type of light neutrino at 98% CL.

AB - The cross-section for e+e− → hadrons in the vicinity of the Z boson peak has been measured with the ALEPH detector at the CERN Large Electron Positron collider, LEP. Measurements of the Z mass, Mz = (91.174±0.070) GeV, the Z width Γz=(2.68±0.15) GeV, and of the peak hadronic cross-section, σhadpeak=(29.3±1.2) nb, are presented. With the constraints of the standard electroweak model, the number of light neutrino species is found to be Nv=3.27±0.30. this results rules out of the possibility of a fourth type of light neutrino at 98% CL.

U2 - 10.1016/0370-2693(89)90704-1

DO - 10.1016/0370-2693(89)90704-1

M3 - Journal article

VL - 231

SP - 519

EP - 529

JO - Physics Letters B

JF - Physics Letters B

SN - 0370-2693

IS - 4

ER -

Research

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