论文标题
LHC中潜伏在半可见喷气机中的瘦素
Leptons lurking in semi-visible jets at the LHC
论文作者
论文摘要
这封信提出了新的搜索，以限制大型强子对撞机的黑暗部门。由于隐藏区域中强大的动态，暗物质可以以含有稳定的无形结合状态的辐射式喷射器的形式出现在大型强子对撞机的质子proton碰撞中。这些半可见的喷气机已在理论上和实验中进行了完全悬ic的签名研究，其中不稳定的复合暗物质只能迅速衰减到标准模型夸克。我们提出了一个简化的模型，该模型基于两个由大质量差距隔开的使者磁场，从而使黑暗结合状态可以腐烂成对相对充满电的钩子。所得的实验特征的特征在于半可见喷气机内的非分离的Lepton对。我们提出了一种搜索策略，独立于针对这种新签名的基本模型假设，并讨论有关现有搜索的正交性。在Di-Lepton光谱的形状上保持不可知，我们确定了专用分析对目标信号的敏感性。拟议的搜索可以声称，较重的调解人的3σ证据（排除），质量为3.5 TEV（4.5 TEV），并具有LHC的完整运行2个数据。利用Lepton对的谐振特征可以增强特定模型的灵敏度范围。我们估计，使用Di-Lepton不变质量信息的分析可以达到5σ的发现，最高为3.5 TEV，并将排除量提高到5个以上的TEV。
This Letter proposes a new search for confining dark sectors at the Large Hadron Collider. As a result of the strong dynamics in the hidden sector, dark matter could manifest in proton-proton collisions at the Large Hadron Collider in form of hadronic jets containing stable invisible bound states. These semi-visible jets have been studied theoretically and experimentally in the fully hadronic signature where the unstable composite dark matter can only decay promptly back to Standard Model quarks. We present a simplified model based on two messenger fields separated by a large mass gap allowing dark bound states to decay into pairs of oppositely charged leptons. The resulting experimental signature is characterized by non-isolated lepton pairs inside semi-visible jets. We propose a search strategy independent from the underlying model assumptions targeting this new signature, and discuss the orthogonality with respect to the existing searches. Remaining agnostic on the shape of the di-lepton spectrum, we determine the sensitivity of a dedicated analysis to the target signal. The proposed search can claim the 3σ evidence (exclusion) of the heavier mediator up to masses of 3.5 TeV (4.5 TeV) with the full Run 2 data of the LHC. Exploiting the resonant feature of the lepton pairs can enhance the sensitivity reach on a specific model. We estimate that an analysis using the di-lepton invariant mass information can reach 5σ discovery up to masses of 3.5 TeV and improve the exclusion up to more than 5 TeV.
