论文标题
Georgi-Machacek模型中CDF II的$ W $质量转移的说明
Explanation of the $W$ mass shift at CDF II in the Georgi-Machacek Model
论文作者
论文摘要
CDF II实验最近确定了$ W $ Boson的质量为$ M_W（\ text {cdf ii}）= 80.4335 \ pm 0.0094〜 $ GEV，它偏离标准模型预测为$7σ$级别。尽管这一新结果与其他实验（例如LHC和LEP上的实验）保持了张力，但值得讨论这种异常对新物理学的可能影响。我们表明，这种巨大的差异可以通过Georgi-Machacek模型中的ISOSPIN三重态标量片段的非对齐真空期望值来解释，该模型以潜在的托管对称性破坏术语扩展。后者需要避免不良的Nambu-Goldstone玻色子，并保持辐射校正的一致治疗。以$ m_w（\ text {cdf ii}）$作为1循环级别的重新归化输入之一，我们得出了三胞胎真空期望值的所需差异，然后讨论了场景中现象学后果的讨论。
The CDF II experiment has recently determined the mass of the $W$ boson to be $m_W(\text{CDF II}) = 80.4335 \pm 0.0094~$GeV, which deviates from the standard model prediction at $7σ$ level. Although this new result is in tension with other experiments such as those at LHC and LEP, it is worth discussing possible implications on new physics by this anomaly. We show that this large discrepancy can be explained by non-aligned vacuum expectation values of isospin triplet scalar fields in the Georgi-Machacek model extended with custodial symmetry breaking terms in the potential. The latter is required to avoid an undesirable Nambu-Goldstone boson as well as to be consistent treatment of radiative corrections. With $m_W(\text{CDF II})$ as one of the renormalization inputs at the 1-loop level, we derive the required difference in the triplet vacuum expectation values, followed by a discussion of phenomenological consequences in the scenario.
