A Determination of the Centre-of-Mass Energy at LEP2 using Radiative 2-fermion Events

Abstract

Using e+e- -> mu+mu-(gamma) and e+e- -> qqbar(gamma) events radiative to the Z pole, DELPHI has determined the centre-of-mass energy, sqrt{s}, using energy and momentum constraint methods. The results are expressed as deviations from the nominal LEP centre-of-mass energy, measured using other techniques. The results are found to be compatible with the LEP Energy Working Group estimates for a combination of the 1997 to 2000 data sets.

arXiv comment20 pages, 6 figures, Accepted by Eur. Phys. J. C

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Cited by in corpus (8)

• Electroweak Measurements in Electron-Positron Collisions at W-Boson-Pair Energies at LEP
• Measurement of the Mass and Width of the W Boson in e+e- Collisions at sqrt{s} = 161 - 209 GeV
• Study of W boson polarisations and Triple Gauge boson Couplings in the reaction e+e- -> W+W- at LEP 2
• Measurement of the strong coupling alpha_S from the three-jet rate in e+e- - annihilation using JADE data
• Study of the Dependence of Direct Soft Photon Production on the Jet Characteristics in Hadronic Z^0 Decays
• Observation of the Muon Inner Bremsstrahlung at LEP1
• Measurement of the Strong Coupling alpha_s from the Four-Jet Rate in e+e- Annihilation using JADE data
• Correlations between Polarisation States of W Particles in the Reaction e-e+ -> W-W+ at LEP2 Energies 189-209 GeV