论文标题
从标量门户物质建立动力学混合
Building Kinetic Mixing From Scalar Portal Matter
论文作者
论文摘要
暗物质（DM）的性质及其如何与标准模型（SM）的粒子相互作用是一个不断增长的谜团。新的“黑暗部门”力量的存在可能是解决这个基本问题的关键。在本文中，我们构建了一个模型，其中深色光子通过动力学混合介导了与SM的相互作用。与传统型号不同，在传统模型中，将$ q_d $耦合到深色电荷的深色光子与超充电玻色子混合在一起，我们的模型可有效地将深色光子与electroweak Symmetry损坏后直接与光子混合在一起，但仍未融合到对称性直至对称性断裂。动力学混合是通过满足$ \ sum q_d q_ {em} = 0 $的字段来生成的，这种条件可以保证在一个循环中产生有限的结果。在文献中，这是传统上通过重型费米斯获得的，这可能不在当前加速器的范围之外。相比之下，在此模型中，此过程是由标量“门户”字段介导的，标量“门户网站”字段在标准模型的$ su（2）_l \ times u（times u（1）_y $以及深色量表$ u（1）_d $和获得Gev-Scale vevs的质量中，这给黑暗的higgs和dark dake higgs和dark dark photon而言。额外的标量场相对较轻，在弱尺度上或低于弱尺度，但目前的实验可能仍未发现，因为它们与Sm fermions的耦合仅通过与SM Higgs的百分比混合。在围栏中，由于BSM状态腐烂成MET和SM玻色子，这些模型的特征是相对较低，而MET则与相关生产对象的衰减相平衡。然而，HL-LHC的较高统计数据可能能够探测整个模型空间。
The nature of dark matter (DM) and how it might interact with the particles of the Standard Model (SM) is an ever-growing mystery. It is possible that the existence of new `dark sector' forces, yet undiscovered, are the key to solving this fundamental problem. In this paper, we construct a model in which a dark photon mediates interactions with the SM via kinetic mixing. Unlike traditional models, in which the dark photon, which couples to a dark charge, $Q_D$, mixes with the hypercharge boson, our model effectively mixes the dark photon directly with the photon after electroweak symmetry is broken, but remains unmixed until the symmetry breaks. The kinetic mixing is generated at one loop by fields which satisfy $\sum Q_D Q_{em} = 0$, a condition which guarantees a finite result at one loop. In the literature, this has been traditionally obtained via heavy fermions, which may lie out of the reach of current accelerators. In this model, by contrast, this process is mediated by scalar `portal matter' fields, which are charged under the $SU(2)_L \times U(1)_Y$ of the standard model as well as the dark gauge group $U(1)_D$ and acquire GeV-scale vevs which give mass to the dark Higgs and dark photon. The additional scalar fields are relatively light, at or below the weak scale, yet may remain undetected by current experiments since their couplings to SM fermions come only through percent level mixing with the SM Higgs. At colliders, these models are typified by relatively low MET due the BSM states decaying into MET and SM bosons, with MET which is balanced by the decay of the associated production object. Nevertheless, the higher statistics of HL-LHC may be able to probe the entirety of the model space.
