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北京工业大学高能组

W-boson mass anomaly from a general SU(2)_L scalar multiplet

by Dr 吴 佳骏

Asia/Shanghai
517 (数理楼)

517

数理楼

Description

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 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 with Y=0 or Y=J. As a result, we find that both mechanisms can explain the W-boson mass anomaly without violating any other theoretical or experimental constraints.