W-boson Mass Anomaly from High-Dimensional Scalar Multiplets

2023/07/22 by Wu, JiaJun, Geng, Chao-Qiang, Huang, Da
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2307.12105

Abstract

In light of the recently discovered W-boson mass anomaly by the CDF Collaboration, we discuss two distinct mechanisms that could possibly explain this anomaly through the introduction of high-dimensional SU(2)_L scalar multiplets. The first mechanism is the tree-level W-boson mass correction induced by the vacuum expectation values of one or more SU(2)_L scalar multiplets with odd dimensions of n≥ 3 and zero hypercharge of Y=0 in order to avoid the strong constraint from measurements of the Z-boson mass. The second mechanism is to consider the one-loop level W-boson mass correction from a complex multiplet. In particular, we focus on the case with an additional scalar octuplet with Y=7/2. As a result, we find that both mechanisms can explain the W-boson mass anomaly without violating any other theoretical or experimental constraints.

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