Consistency of New CDF-II W Boson Mass with 123-Model

TL;DR

This paper examines whether the 123-model, an extension of the Standard Model, can accommodate the recent CDF-II W boson mass measurement, finding it consistent at 95% CL when considering theoretical and experimental constraints.

Contribution

The study analyzes the compatibility of the 123-model with the new CDF-II W boson mass measurement, incorporating constraints from $S$ and $T$ parameters and providing a comprehensive fit analysis.

Findings

The 123-model is consistent with the CDF-II W mass measurement at 95% CL.

Inclusion of $S$ and $T$ parameters refines the model's compatibility.

The analysis constrains the parameter space of the 123-model based on recent experimental data.

Abstract

Following the recent update measurement of the W boson mass performed by the CDF-II experiment at Fermilab which indicates $7\sigma$ deviation from the SM prediction. As a consequence, the open question is whether there are extensions of the SM that can carry such a remarkable deviation or what phenomenological repercussions this has. In this paper, we investigate what the theoretical constraints reveal about the \ott model. Also, we study the consistency of a CDF W boson mass measurement with the 123-model expectations, taking into account theoretical and experimental constraints. Both fit results of $S$ and $T$ parameters before and after $m_{W}^{\rm{CDF}}$ measurement are, moreover, considered in this study. Under these conditions, we found that the 123-model prediction is consistent with the measured $m_{W}^{\rm{CDF}}$ at a $95\%$ Confidence Level (CL).