论文标题
在J-PARC的Trek/E36实验中搜索轻中性玻色子
Search for Light Neutral Bosons in the TREK/E36 Experiment at J-PARC
论文作者
论文摘要
标准模型（SM）代表了我们对亚原子世界的最佳描述，它在解释基本粒子如何在基本力的影响下相互作用方面非常成功。尽管在描述物质的基础方面取得了很大的成功，但SM仍然不完整。无法解释暗物质，男性生成，中微子肿块等等。在日本的J-PARC进行的E36实验，可以在Muonic $ k^+$衰减频道中搜索轻$ u（1）$ gauge玻色子。这样的$ u（1）$玻色子可能与暗物质有关，也可以解释已建立的与Muon相关的异常情况，例如Muon $G_μ-2$值和质子半径拼图。使用闪烁的纤维目标来阻止一束带正电荷的$ K $介子。 $ k^+$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $的产物能够跟踪具有高分辨率的带电颗粒，并结合大型实体角CSI（TI）光子检测器和粒子ID系统。采用了一个现实的模拟来搜索这些罕见的衰变，在20 $ -100 mev/$ c^2 $的质量范围内。将讨论$ a^\ prime $分支比率$ \ mathcal {b} r（a^\ prime）$的上限的初步结果。
The Standard Model (SM) represents our best description of the subatomic world and it has been very successful in explaining how elementary particles interact under the influence of the fundamental forces. Despite its far reaching success in describing the building blocks of matter, the SM is still incomplete; falling short to explain dark matter, baryogenesis, neutrino masses and much more. The E36 experiment conducted at J-PARC in Japan, allows for sensitivity to search for light $U(1)$ gauge bosons, in the muonic $K^+$ decay channel. Such $U(1)$ bosons could be associated with dark matter or explain established muon-related anomalies such as the muon $g_μ-2$ value, and the proton radius puzzle. A scintillating fiber target was used to stop a beam of positively charged $K$ mesons. The $K^+$ products were detected with a large-acceptance toroidal spectrometer capable of tracking charged particles with high resolution, combined with a large solid angle CsI(TI) photon detector and particle ID systems. A realistic simulation was employed to search for these rare decays in the mass range of 20$-$100 MeV/$c^2$. Preliminary results of the upper limits for the $A^\prime$ branching ratio $\mathcal{B}r(A^\prime)$ extracted at 95\% CL, will be discussed.
