Determination of the LEP centre-of-mass energy from Zgamma events
arXiv:hep-ex/9907043 · doi:10.1016/S0370-2693(99)00903-X
Abstract
Radiative returns to the Z resonance (Zgamma events) are used to determine the LEP2 centre-of-mass energy from the data collected with the ALEPH detector in 1997. The average centre-of-mass energy is measured to be: E_CM = 182.50 +- 0.19(stat) +- 0.08(syst) GeV in good agreement with the precise determination by the LEP energy working group of 182.652 +- 0.050 GeV. If applied to the measurement of the W mass, its precision translates into a systematic error on M_W which is smaller than the statistical error achieved from the corresponding dataset.
9 pages, 1 figure
References in corpus (1)
Cited by in corpus (4)
- Measurement of the Mass and Width of the W Boson in e+e- Collisions at sqrt{s} = 161 - 209 GeV
- Measurement of the W boson mass and width in e+e- collisions at LEP
- Determination of the LEP Beam Energy using Radiative Fermion-pair Events
- A Determination of the Centre-of-Mass Energy at LEP2 using Radiative 2-fermion Events