Compatibility and combination of world W-boson mass measurements
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 mW measurements yields a value of mW = 80394.6 +- 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 80369.2 +- 13.3 MeV, which differs by 3.6 sigma from the CDF value determined using the same PDF set.
Keywords
Cite
@article{arxiv.2308.09417,
title = {Compatibility and combination of world W-boson mass measurements},
author = {Simone Amoroso and Nansi Andari and William Barter and Josh Bendavid and Maarten Boonekamp and Stephen Farry and Martin Gruenewald and Chris Hays and Ross Hunter and Jan Kretzschmar and Oliver Lupton and Martina Pili and Miguel Ramos Pernas and Boris Tuchming and Mika Vesterinen and Alessandro Vicini and Chen Wang and Menglin Xu},
journal= {arXiv preprint arXiv:2308.09417},
year = {2025}
}
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