arXiv 1810.040482018-10hep-ph

Manohar-Wise模型中色八重标量衰变为胶子和电弱规范玻色子

Color-octet scalar decays to a gluon and an electroweak gauge boson in the Manohar-Wise model

Alper Hayreter, German Valencia

备注：: 17 pages, 7 Figures
发表信息：: Phys. Rev. D 102, 115033 (2020)
DOI：: 10.1103/PhysRevD.102.115033

摘要：

我们提出了一个循环的结果引起的振幅之间的耦合色八隅标量，胶子，和电弱规范玻色子。这些振幅可能预示着大型强子对撞机产生的$γ$喷流、$Z$喷流和$W$喷流中的新物理现象。我们计算相关的分支比，并确定这些衰减模式变得重要的参数空间的区域。这可能发生在标量质量低于衰变成重夸克对（$t\bar t$和$t\bar b$）的阈值时;或者发生在小的汤川耦合时，在这种情况下，有色标量是疏费米的。在轻标量的情况下，${\cal B}(S\to γg)$可以达到10%，而${\cal B}(S\to Z g)$可以达到几个百分点。在参数空间的疏费米区域，${\cal B}(S\to γg)$和${\cal B}(S\to Z g)$分别可达72%和2 8%，而${\cal B}(S\to g g)$可达10 0%.对于带电标量，衰减模式${\cal B}(S^\pm \to W^\pm g)$在两种情况下都可以成为主导。

英文摘要：

We present one loop results for the amplitudes giving rise to couplings between a color octet scalar, a gluon, and an electroweak gauge boson. These amplitudes could signal new physics in $γ$ jet, $Z$ jet and $W$ jet production at the LHC. We compute the relevant branching ratios and identify regions of parameter space where these decay modes become important. This can happen for scalar masses below the threshold for decay into heavy quark pairs ($t\bar t$ and $t\bar b$); or for small Yukawa couplings in which case the colored scalars are fermiophobic. In the case of light scalars, ${\cal B}(S\to γg)$ can reach up to 10\% whereas ${\cal B}(S\to Z g)$ can reach a few percent. In the fermiophobic region of parameter space, ${\cal B}(S\to γg)$ and ${\cal B}(S\to Z g)$ can reach up to 72\% and 28\% respectively, whereas ${\cal B}(S\to g g)$ can be 100\%. For the charged scalar, the decay mode ${\cal B}(S^\pm \to W^\pm g)$ can become dominant in both scenarios.

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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英文摘要：

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