학술논문
Compatibility and combination of world W-boson mass measurements
Document Type
Original Paper
Author
Source
The European Physical Journal C: Particles and Fields. 84(5)
Subject
Language
English
ISSN
1434-6052
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 mWmW=80,394.6±11.580,369.2±13.33.6σ measurements yields a value of mWmW=80,394.6±11.580,369.2±13.33.6σ 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 mWmW=80,394.6±11.580,369.2±13.33.6σ MeV, which differs by mWmW=80,394.6±11.580,369.2±13.33.6σ from the CDF value determined using the same PDF set.