Compatibility and combination of world W-boson mass measurements
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10052_2024_Article_12532.pdf
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Author(s)
Amoroso, S.
Andari, N.
Barter, W.
Bendavid, J.
Boonekamp, M.
Farry, S.
Grünewald, M.
Hays, C.
Hunter, R.
Kretzschmar, J.
Date Issued
May 2, 2024
Publisher
Springer Science and Business Media LLC
Citation
LHC-TeV MW Working Group., Amoroso, S., Andari, N. et al. Compatibility and combination of world W-boson mass measurements. Eur. Phys. J. C 84, 451 (2024).
Version
Final published version
Abstract
The compatibility of W-boson mass measurements performed by the ATLAS, LHCb, CDF, and D0 experiments is studied using a coherent framework with theory uncertainty correlations. The measurements are combined using a number of recent sets of parton distribution functions (PDF), and are further combined with the average value of measurements from the Large Electron–Positron collider. The considered PDF sets generally have a low compatibility with a suite of global rapidity-sensitive Drell–Yan measurements. The most compatible set is CT18 due to its larger uncertainties. A combination of all $$m_W$$
m W measurements yields a value of $$m_W = 80{,}394.6 \pm 11.5$$ m W = 80 , 394.6 ± 11.5 MeV with the CT18 set, but has a probability of compatibility of 0.5% and is therefore disfavoured. Combinations are performed removing each measurement individually, and a 91% probability of compatibility is obtained when the CDF measurement is removed. The corresponding value of the W boson mass is $$80{,}369.2 \pm 13.3$$ 80 , 369.2 ± 13.3 MeV, which differs by $$3.6\sigma $$ 3.6 σ from the CDF value determined using the same PDF set.
m W measurements yields a value of $$m_W = 80{,}394.6 \pm 11.5$$ m W = 80 , 394.6 ± 11.5 MeV with the CT18 set, but has a probability of compatibility of 0.5% and is therefore disfavoured. Combinations are performed removing each measurement individually, and a 91% probability of compatibility is obtained when the CDF measurement is removed. The corresponding value of the W boson mass is $$80{,}369.2 \pm 13.3$$ 80 , 369.2 ± 13.3 MeV, which differs by $$3.6\sigma $$ 3.6 σ from the CDF value determined using the same PDF set.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1140/epjc/s10052-024-12532-z
