Hadronic uncertainties versus new physics for the W boson mass and Muon g - 2 anomalies.

ABSTRACT: There are now two single measurements of precision observables that have major anomalies in the Standard Model: the recent CDF measurement of the W mass shows a 7σ deviation and the Muon g - 2 experiment at FNAL confirmed a long-standing anomaly, implying a 4.2σ deviation. Doubts regarding new physics interpretations of these anomalies could stem from uncertainties in the common hadronic contributions. We demonstrate that these two anomalies pull the hadronic contributions in opposite directions by performing electroweak fits in which the hadronic contribution was allowed to float. The fits show that including the g - 2 measurement worsens the tension with the CDF measurement and conversely that adjustments that alleviate the CDF tension worsen the g - 2 tension beyond 5σ. This means that

SUBMITTER: Athron P 

PROVIDER: S-EPMC9902446 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature