论文标题
在$^7 $ li（$ p $，$ e^+e^ - $）$^8 $中观察X17异常
Observation of the X17 anomaly in the $^7$Li($p$,$e^+e^-$)$^8$Be direct proton-capture reaction
论文作者
论文摘要
$ e^+e^ - $对的角相关光谱在$^{7} $ li（$ p $，$γ$）$^{8} $中进行了核反应，以夏普$ e_p $ = 441 keV共振和$ e_p $ = 650 kev，800 kev，800 kev，800 kev和1100 kev pot yev poteron。在共振下测得的光谱可以通过M1内部对创建过程来理解，但是在离子区域（直接质子捕获）的情况下，在$ E^+E^ - $角相关性中观察到了显着的异常，支持X17假设粒子创造和衰减。
Angular correlation spectra of $e^+e^-$ pairs produced in the $^{7}$Li($p$,$γ$)$^{8}$Be nuclear reaction have been studied at the sharp $E_p$= 441 keV resonance as well as at $E_p$= 650 keV, 800 keV and 1100 keV proton beam energies. The spectra measured at the resonance can be understood through the M1 internal pair creation process, but in the case of the off-resonance regions (direct proton capture) significant anomalies were observed in the $e^+e^-$ angular correlations supporting the X17 hypothetical particle creation and decay.
