Compatibility and combination of world W -boson mass measurements

Journal article

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=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±13.3 MeV, which differs by 3.6σ from the CDF value determined using the same PDF set.

Authors: Amoroso, S; Andari, N; Barter, W; Bendavid, J; Boonekamp, M

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: SpringerOpen
• Journal: The European Physical Journal C
• Volume: 84
• Issue: 5
• Article number: 451
• Publication date: 2024-05-02
• Acceptance date: 2024-02-08
• DOI: 10.1140/epjc/s10052-024-12532-z
• EISSN: 1434-6052
• ISSN: 1434-6044
• Language: English