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arXiv 1806.08271hep-ph
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框架标准模型中的$Z$玻色子

The $Z$ boson in the Framed Standard Model

Jose Bordes, H. M. Chan, S. T. Tsou

摘要:

框架标准模型(FSM)最初是为了解释三代费米子的存在以及夸克和轻子的分级质量和混合模式而构建的,它也暗示了一个包括一些暗物质候选者在内的粒子的“隐藏部分”。它还预测了一个新的矢量玻色子$G$,质量为TeV,它与标准模型的$γ$和$Z$混合,产生与标准混合方案的偏差,所有这些都可以用一个未知参数$m_G$来计算。由于标准混合已经被实验检验到很高的精度,这可能会导致矛盾,但它表明,在这里,对于三个关键的和可检验的情况下,到目前为止研究(i)$m_Z - m_W$,(ii)$Γ(Z \rightarrow \ell^ + \ell^-)$,(iii)$Γ(Z \rightarrow$强子),偏差都在目前严格的实验范围内提供$m_G > 1$ TeV,但应该很快就可以检测到,如果实验精度提高。这是因为一些微妙的取消,这可能有一个更深层次的原因,还没有被理解。通过混合,$G$可以在LHC中产生,并表现为$\ell^+ \ell^-$异常。如果被发现,它将不仅因为其本身而引起人们的兴趣,而且还可以作为一个窗口,进入它将主要衰变的“隐藏部门”,最有可能的产物是暗物质候选者。

英文摘要:

The framed standard model (FSM), constructed initially for explaining the existence of three fermion generations and the hierarchical mass and mixing patterns of quarks and leptons, suggests also a "hidden sector" of particles including some dark matter candidates. It predicts in addition a new vector boson $G$, with mass of order TeV, which mixes with the $γ$ and $Z$ of the standard model yielding deviations from the standard mixing scheme, all calculable in terms of a single unknown parameter $m_G$. Given that standard mixing has been tested already to great accuracy by experiment, this could lead to contradictions, but it is shown here that for the three crucial and testable cases so far studied (i) $m_Z - m_W$, (ii) $Γ(Z \rightarrow \ell^ + \ell^-)$, (iii) $Γ(Z \rightarrow$ hadrons), the deviations are all within the present stringent experimental bounds provided $m_G > 1$ TeV, but should soon be detectable if experimental accuracy improves. This comes about because of some subtle cancellations, which might have a deeper reason that is not yet understood. By virtue of mixing, $G$ can be produced at the LHC and appear as a $\ell^+ \ell^-$ anomaly. If found, it will be of interest not only for its own sake but serve also as a window on to the "hidden sector" into which it will mostly decay, with dark matter candidates as most likely products.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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