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A direct measurement of the invisible width of the Z from single photon counting

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A direct measurement of the invisible width of the Z from single photon counting. / ALEPH Collaboration.
In: Physics Letters B, Vol. 313, No. 3-4, 1993, p. 520-534.

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

Harvard

ALEPH Collaboration 1993, 'A direct measurement of the invisible width of the Z from single photon counting', Physics Letters B, vol. 313, no. 3-4, pp. 520-534. https://doi.org/10.1016/0370-2693(93)90027-F

APA

ALEPH Collaboration (1993). A direct measurement of the invisible width of the Z from single photon counting. Physics Letters B, 313(3-4), 520-534. https://doi.org/10.1016/0370-2693(93)90027-F

Vancouver

ALEPH Collaboration. A direct measurement of the invisible width of the Z from single photon counting. Physics Letters B. 1993;313(3-4):520-534. doi: 10.1016/0370-2693(93)90027-F

Author

ALEPH Collaboration. / A direct measurement of the invisible width of the Z from single photon counting. In: Physics Letters B. 1993 ; Vol. 313, No. 3-4. pp. 520-534.

Bibtex

@article{458a6d82edf64b0391c2ab909fdb2da7,
title = "A direct measurement of the invisible width of the Z from single photon counting",
abstract = "The ALEPH detector at LEP is used to study single photon events in e+e- collisions at the Z resonance. In a total data sample of 15.7 pb−1 taken in 1990 and 1991 scanning the resonance, 400 events were recorded where each has a single deposition of more than 1.5 GeV measured in the polar angular region | cosθγ | < 0.74 of the electromagnetic calorimeter. It is shown that this number of events cab be accounted for by known processes. After subtraction of background events, the invisible width of the Z is determined to be 45 ± 34(stat.) ± 34(syst.) MeV. Using Z. resonance parameters derived by ALEPH, the corresponding number oflight neutrino generations is found to be 2.68 ± 0.20(stat.) ± 0.20(syst.).",
author = "D. Buskulic and Alexander Finch and {ALEPH Collaboration}",
year = "1993",
doi = "10.1016/0370-2693(93)90027-F",
language = "English",
volume = "313",
pages = "520--534",
journal = "Physics Letters B",
issn = "0370-2693",
publisher = "ELSEVIER SCIENCE BV",
number = "3-4",

}

RIS

TY - JOUR

T1 - A direct measurement of the invisible width of the Z from single photon counting

AU - Buskulic, D.

AU - Finch, Alexander

AU - ALEPH Collaboration

PY - 1993

Y1 - 1993

N2 - The ALEPH detector at LEP is used to study single photon events in e+e- collisions at the Z resonance. In a total data sample of 15.7 pb−1 taken in 1990 and 1991 scanning the resonance, 400 events were recorded where each has a single deposition of more than 1.5 GeV measured in the polar angular region | cosθγ | < 0.74 of the electromagnetic calorimeter. It is shown that this number of events cab be accounted for by known processes. After subtraction of background events, the invisible width of the Z is determined to be 45 ± 34(stat.) ± 34(syst.) MeV. Using Z. resonance parameters derived by ALEPH, the corresponding number oflight neutrino generations is found to be 2.68 ± 0.20(stat.) ± 0.20(syst.).

AB - The ALEPH detector at LEP is used to study single photon events in e+e- collisions at the Z resonance. In a total data sample of 15.7 pb−1 taken in 1990 and 1991 scanning the resonance, 400 events were recorded where each has a single deposition of more than 1.5 GeV measured in the polar angular region | cosθγ | < 0.74 of the electromagnetic calorimeter. It is shown that this number of events cab be accounted for by known processes. After subtraction of background events, the invisible width of the Z is determined to be 45 ± 34(stat.) ± 34(syst.) MeV. Using Z. resonance parameters derived by ALEPH, the corresponding number oflight neutrino generations is found to be 2.68 ± 0.20(stat.) ± 0.20(syst.).

U2 - 10.1016/0370-2693(93)90027-F

DO - 10.1016/0370-2693(93)90027-F

M3 - Journal article

VL - 313

SP - 520

EP - 534

JO - Physics Letters B

JF - Physics Letters B

SN - 0370-2693

IS - 3-4

ER -