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A DIRECT DETERMINATION OF THE NUMBER OF LIGHT NEUTRINO FAMILIES FROM E+E--]NU-NU-BAR-GAMMA AT LEP

Abstract:: The L3 detector at LEP has been used to determine the number of light neutrino families by measuring the cross section of single photon even in e+e- collisions at energies near the Z0 resonance. We have observed 61 single photon candidates with more than 1.5 GeV of deposited energy in the barrel electromagnetic calorimeter, for a total integrated luminosity of 3.0 pb-1. From a likelihood fir to the single photon cross sections, we determin Nν=3.24 ± 0.46 (statistical) ±0.22 (systematic). © 1992.

Publication status:: Published

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APA Style

Adeva, B., Adriani, O., Aguilarbenitez, M., Akbari, H., Alcaraz, J., Aloisio, A., Alverson, G., Alviggi, M., Ambrosi, G., An, Q., Anderhub, H., Anderson, A., Andreev, V., Angelov, T., Antonov, L., Antreasyan, D., Arce, P., Arefiev, A., Atamanchuk, A., … Baksay, L. (1992). A DIRECT DETERMINATION OF THE NUMBER OF LIGHT NEUTRINO FAMILIES FROM E+E--]NU-NU-BAR-GAMMA AT LEP. Physics Letters B, 275(1-2), 209–221.

MLA Style

Adeva, B., et al. “A DIRECT DETERMINATION OF THE NUMBER OF LIGHT NEUTRINO FAMILIES FROM E+E--]NU-NU-BAR-GAMMA AT LEP.” Physics Letters B, vol. 275, no. 1-2, 1992, pp. 209–21.

Chicago Style

Adeva, B, O Adriani, M Aguilarbenitez, H Akbari, J Alcaraz, A Aloisio, G Alverson, et al. 1992. “A DIRECT DETERMINATION OF THE NUMBER OF LIGHT NEUTRINO FAMILIES FROM E+E--]NU-NU-BAR-GAMMA AT LEP.” Physics Letters B 275 (1-2): 209–21.
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Publisher copy:: 10.1016/0370-2693(92)90877-7

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+ Adriani, O More by this author

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+ Aguilarbenitez, M More by this author

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Bibliographic Details

Journal:: Physics Letters B
Volume:: 275
Issue:: 1-2
Pages:: 209-221
Publication date:: 1992-01-23
DOI:: 10.1016/0370-2693(92)90877-7
ISSN:: 0370-2693

Item Description

Pubs id:: pubs:2116
UUID:: uuid:a804d512-34a3-4cd6-9317-dbe02589e0ca
Local pid:: pubs:2116
Source identifiers:: 2116
Deposit date:: 2012-12-19

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Copyright date:: 1992

Licence:: Terms and Conditions of Use for Oxford University Research Archive

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