Paper

Compatibility and combination of world W-boson mass measurements

Miguel Ramos Pernas, Xu, Menglin, Andari, Nansi, Amoroso, Simone, Hays, Chris, Boonekamp, Maarten, Pili, Martina, Farry, Stephen, Vicini, Alessandro, Gruenewald, Martin, Kretzschmar, Jan, Tuchming, Boris, Vesterinen, Mika, Lupton, Oliver, Barter, William, Bendavid, Josh, Hunter, Ross, Wang, Chen

2023

Overview

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.

• Publisher: Cornell University Library, arXiv.org
• Subject: Compatibility / Distribution functions / Electron-positron accelerators / Large Hadron Collider / Partons / Uncertainty