论文标题
Dirac Gaugino模型中的颜色octet标量与破碎的$ r $对称性
Color-octet scalars in Dirac gaugino models with broken $R$ symmetry
论文作者
论文摘要
在这项工作中,我们研究了带有Dirac Gaugino群众的超对称模型的颜色量表标量(SGLUON)的对撞机现象学,这些模型具有明显破损的$ r $ symmetry($ r $ $ $ brebrokent Models)。我们通过增强最小$ r $ $ smmore的模型来构建此类模型,并具有相当通用的超对称性和柔和的超对称性操作员,这些操作员明确破坏了$ r $ $ $对称性。然后,我们计算了所有重要的两体衰变的速率,并突出了由于破坏$ r $对称性而出现的新功能,包括增强现存衰减速率,新颖的树和环级衰减,以及改进的单个SGLUON产生的横截面。我们详细说明了如何通过恢复$ r $对称性来获得最小$ r $ smortric模型的熟悉结果。与此讨论并行,我们探讨了大型强子对撞机对这些模型的约束。我们发现,通常,$ r $对称性破坏对颜色 - octet标量的现有限制,也许会关闭光CP-ODD(伪尺度)sgluons的漏洞,同时打开一个用于光CP-even(标量)粒子的漏洞。然而,从定性上讲,我们发现 - 尽管现象学上的差异很大,但尽管$ r $ $ $ $ $ $ - 对称模型 - $ r $ $对称性的场景差异很大,并且可以通过现有搜索来适应TEV量表以下的两个sgluons。
In this work we study the collider phenomenology of color-octet scalars (sgluons) in supersymmetric models with Dirac gaugino masses that feature an explicitly broken $R$ symmetry ($R$-broken models). We construct such models by augmenting minimal $R$-symmetric models with a fairly general set of supersymmetric and softly supersymmetry-breaking operators that explicitly break $R$ symmetry. We then compute the rates of all significant two-body decays and highlight new features that appear as a result of $R$ symmetry breaking, including enhancements to extant decay rates, novel tree- and loop-level decays, and improved cross sections of single sgluon production. We demonstrate in some detail how the familiar results from minimal $R$-symmetric models can be obtained by restoring $R$ symmetry. In parallel to this discussion, we explore constraints on these models from the Large Hadron Collider. We find that, in general, $R$ symmetry breaking quantitatively affects existing limits on color-octet scalars, perhaps closing loopholes for light CP-odd (pseudoscalar) sgluons while opening one for a light CP-even (scalar) particle. Qualitatively, however, we find that -- much as for minimal $R$-symmetric models, despite stark differences in phenomenology -- scenarios with broken $R$ symmetry and two sgluons below the TeV scale can be accommodated by existing searches.