AI 中文总结
NA64h实验在5-50 GeV能区利用π⁻、K⁻束与核靶的电荷交换反应，通过精确评估电荷交换截面，为寻找与夸克耦合的暗区提供灵敏度估算依据，相关结果或可用于其他实验。
AI 中文摘要
我们探讨了一种新方法，用于在欧洲核子中心NA64h实验中，借助π⁻(K⁻)+(A,Z)→π⁰,η,η'(K̄⁰)+(A,Z-1)的电荷交换（CEX）反应，在能量范围5至50 GeV的核靶(A,Z)上产生的轻中性介子的不可见衰变和振荡中，寻找与夸克耦合的暗区。对于所提搜索的投影灵敏度估算，介子产额的知识至关重要。本工作致力于在宽能量范围和靶核上精确评估CEX截面，这也可能对其他实验有用。
英文摘要
We discuss a new approach to search for dark sector coupled to quarks in the invisible decays and oscillations of light neutral mesons produced in the charge-exchange (CEX) reactions with pion and kaon beams $π^-(K^-)+ (A, Z) \to π^0, η, η' (\bar K^0) + (A,Z-1)$ at nuclei target $(A,Z)$ in the NA64h experiment at CERN for $P_{\rm Lab}$ running in the interval from 5 to 50 GeV. For estimating of the projection sensitivity for the proposed searches the knowledge of the meson yield is crucial. This work is dedicated to the accurate evaluation of CEX cross sections for the wide range of energies and target nuclei which could be also useful for other experiments.
Comments7 pages, 8 figures
