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The number of neutrinos and the Z line shape

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Published in Comptes rendus physique. 2002, vol. 3, no. 9, p. 1155-1164
Abstract Thanks to a precise calibration and monitoring of the LEP beam energy the Z resonance line shape has been precisely measured, hence permitting accurate determinations of the Z mass and width. A large effort was spent by the experiments for the measurement of the LEP luminosity, enabling the number of neutrino types to be precisely determined. The result, Nν=2.9841±0.0083, demonstrates the existence of only 3 neutrino species.
Keywords Z line shapeZ massNeutrino types
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BLONDEL, Alain. The number of neutrinos and the Z line shape. In: Comptes rendus physique, 2002, vol. 3, n° 9, p. 1155-1164. https://archive-ouverte.unige.ch/unige:39111

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Deposited on : 2014-08-04

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