Scientific article
Open access

Measurement of the Z-boson mass using e+e -> Zγ events at centre-of-mass energies above the Z pole

ContributorsL3 Collaboration
Published inPhysics letters. B, vol. 585, no. 1-2, p. 42-52
Publication date2004

Events from the e+e−→Zγ process with hard initial-state radiation collected with the L3 detector at centre-of-mass energies between 183 and 209 GeV are used to measure the mass of the Z boson. Decays of the Z boson into hadrons or muon pairs are considered and the Z mass is determined to be 91.272±0.032(stat)±0.033(syst) GeV, in agreement with the value measured at the Z resonance. Alternatively, assuming this measured value of the Z mass, the method determines the LEP centre-of-mass energy, found to be 175±68(stat)±68(syst) MeV lower than the nominal value.

Citation (ISO format)
L3 Collaboration. Measurement of the Z-boson mass using e<sup>+</sup>e<sup>−</sup> -&gt; Z<em>γ</em> events at centre-of-mass energies above the Z pole. In: Physics letters. B, 2004, vol. 585, n° 1-2, p. 42–52. doi: 10.1016/j.physletb.2004.01.074
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Article (Published version)
ISSN of the journal0370-2693

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