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=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 3.6 σ from the CDF value determined using the same PDF set.
- Publication:
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European Physical Journal C
- Pub Date:
- May 2024
- DOI:
- 10.1140/epjc/s10052-024-12532-z
- arXiv:
- arXiv:2308.09417
- Bibcode:
- 2024EPJC...84..451L
- Keywords:
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- High Energy Physics - Experiment
- E-Print:
- Submitted to EPJC