论文标题
黑暗部门首先在Belle II结果
Dark Sector first results at Belle II
论文作者
论文摘要
了解暗物质的性质是当今基本物理学中最令人兴奋的挑战之一，需要不同搜索技术的协同作用以及理论输入。 \ textit {b} - factories提供的一个有趣的发现暗物质的机会。 Belle〜II实验位于Superkekb非对称能量$ E^+E^ - $ Collider的相互作用点，是在日本Kek实验室运行的新一代\ Textit \ textit {B} -Factortor实验。用机器设计亮度为$ 6 \ times10^{35} \，\ rm {cm}^{ - 2} s^{ - 1} $，Belle II的目标是在下一个十年内记录50 AB $^{ - 1} $。得益于这个大型数据样本并使用专用触发器，Belle〜II有望在质量范围内具有前所未有的灵敏度的黑暗扇区候选者，最高10 GEV $/c^2 $。在2018年期间，该实验结束了调试运行，收集了与大约0.5 fb $^{ - 1} $的集成发光度相对应的数据样本，而主操作于2019年3月开始，几乎完整的检测器开始。到目前为止，实验收集了$ \ sim90 \，\ rm {fb}^{ - 1} $的集成光度。有了这些数据集，Belle〜II已经表明了在GEV质量范围内寻找各种各样的黑暗扇区候选者的可能性。本文回顾了在Belle〜II实验中执行的黑暗扇区搜索的状态，重点是首次获得的结果和可在短期内提供的数据集的发现潜力。
Understanding the nature of dark matter is one of the most exciting challenges in fundamental physics nowadays, requiring the synergy of different search techniques, as well as theoretical inputs. An interesting opportunity for the investigation of dark matter is the one offered by the \textit{B}-factories. The Belle~II experiment, located at the interaction point of the SuperKEKB asymmetric energy $e^+e^-$ collider, is a new generation \textit{B}-factory experiment operating at the Japanese KEK laboratory. With a machine design luminosity of $6\times10^{35}\,\rm{cm}^{-2}s^{-1}$, Belle II aims to record 50 ab$^{-1}$ of data within the next decade. Thanks to this large data-sample and by using dedicated triggers, Belle~II is expected to explore dark sector candidates with unprecedented sensitivity in the mass range up to 10 GeV$/c^2$. During 2018, the experiment concluded a commissioning run, collecting a data-sample corresponding to an integrated luminosity of about 0.5 fb$^{-1}$, while main operations started on March 2019 with an almost complete detector. So far the experiment collected an integrated luminosity of $\sim90\, \rm{fb}^{-1}$. With these data-sets Belle~II has already shown the possibility to search for a large variety of dark sector candidates in the GeV mass range. This paper reviews the status of the dark sector searches performed at the Belle~II experiment, with a focus on the first obtained results and the discovery potential with the data-set available in the short term.
