A bstract The pp → W ± (→ μ ± ν μ) X cross-sections are measured at a proton-proton centre-of-mass energy s=5. 02 s = 5. 02 TeV using a dataset corresponding to an integrated luminosity of 100 pb − 1 recorded by the LHCb experiment. Considering muons in the pseudorapidity range 2. 2 σ W + → μ + ν μ = 300. 9 ± 2. 4 ± 3. 8 ± 6. 0 pb, σ W − → μ − ν ¯ μ = 236. 9 ± 2. 1 ± 2. 7 ± 4. 7 pb, where the first uncertainties are statistical, the second are systematic, and the third are associated with the luminosity calibration. These integrated results are consistent with theoretical predictions. This analysis introduces a new method to determine the W -boson mass using the measured differential cross-sections corrected for detector effects. The measurement is performed on this statistically limited dataset as a proof of principle and yields mW=80369 130 33\ MeV, m W = 80369 ± 130 ± 33 MeV, where the first uncertainty is experimental and the second is theoretical.
Aaij et al. (Mon,) studied this question.