论文标题
在Belle II预测黑暗阵雨
Forecasting dark showers at Belle II
论文作者
论文摘要
局限于GEV量表的强烈相互作用的黑暗部门的黑暗淋浴会引起$ E^+E^ - $ colliders的新颖签名。在这项工作中，我们研究了$ b $工厂实验对通过由重壳介质引起的有效互动产生的黑暗阵雨的敏感性。我们表明，与Babar的现有搜索相比，Belle II的GEV规模长期颗粒的前瞻性搜索可以提高对黑暗淋浴的敏感性。我们将搜索流离失所信号的灵敏度与在Babar和Kloe迅速产生共振的搜索的敏感性，并计算Belle II单光子搜索的灵敏度投影与通过有效互动产生的隐形黑暗阵雨。有效相互作用的基础结构可以在更高能量实验中解析，在该实验中可以在壳上产生介体。为了研究产生的约束，我们在动力学混合$ z'$ boson上更新Electroweak Precision Precision界限，并在LHCB上以黑暗淋浴的方式重新解释了在LHCB的低质量Di-Muon共振。我们发现LHCB和Belle II对不同的颗粒衰减长度最敏感，强调了LHC和强度边界实验的互补性。
Dark showers from strongly interacting dark sectors that confine at the GeV scale can give rise to novel signatures at $e^+e^-$ colliders. In this work, we study the sensitivity of $B$ factory experiments to dark showers produced through an effective interaction arising from a heavy off-shell mediator. We show that a prospective search for displaced vertices from GeV-scale long-lived particles at Belle II can improve the sensitivity to dark showers substantially compared to an existing search at BaBar. We compare the sensitivity of searches for displaced signals to searches for promptly produced resonances at BaBar and KLOE and calculate sensitivity projections for a single-photon search at Belle II to invisible dark showers produced through an effective interaction. The underlying structure of the effective interaction can be resolved at higher-energy experiments, where the mediator can be produced on-shell. To study the resulting constraints, we update electroweak precision bounds on kinetically mixed $Z'$ bosons and reinterpret a search for low-mass di-muon resonances at LHCb in terms of dark showers. We find that LHCb and Belle II are most sensitive to different particle decay lengths, underscoring the complementarity of LHC and intensity frontier experiments.
