arXiv 2607.19495nucl-ex

使用J-PET探测系统对正电子素衰变的Dalitz图进行实验测定

Experimental determination of the Dalitz plot for positronium decay using the J-PET detection system

Magdalena Skurzok, Steven D. Bass, Kamila Kasperska, Ermias Beyene, Neha Chug, Catalina Curceanu, Eryk Czerwinski, Manish Das, Marek Gorgol, Sharareh Jalali, Bo… 展开作者

Magdalena Skurzok, Steven D. Bass, Kamila Kasperska, Ermias Beyene, Neha Chug, Catalina Curceanu, Eryk Czerwinski, Manish Das, Marek Gorgol, Sharareh Jalali, Bozena Jasinska, Krzysztof Kacprzak, Tevfik Kaplanoglu, Łukasz Kapłon, Aleksander Khreptak, Tomasz Kozik, Deepak Kumar, Karol Kubat, Sumit Kumar Kundu, Edward Lisowski, Filip Lisowski, Bartłomiej Łach, Justyna Mędrala-Sowa, Wiktor Mryka, Simbarashe Moyo, Szymon Niedźwiecki, Anand Pandey, Piyush Pandey, Alessio Porcelli, Bartłomiej Rachwał, Martin Rädlera, Sushil Sharma, Ewa Stępień, Tomasz Szumlak, Pooja Tanty, Keyvan Tayefi Ardebili, Satyam Tiwari, Kavya Valsan Eliyan, Anoop K. Venadan, Paweł Moskal

首次发表 2026-07-23

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中文总结 AI 辅助

该研究利用J-PET探测系统首次对正电子素湮灭为三个光子的Dalitz图进行测量，在几乎整个相空间角度表示上有一定精度，新测量结果与QED预测一致，填补了三体正电子素衰变Dalitz图研究的空白。

中文摘要 AI 辅助

我们展示了对正电子素湮灭为三个光子的Dalitz图的首次测量。使用基于有机闪烁体条的雅盖隆正电子发射断层扫描仪（J-PET）进行测量，在几乎整个可用相空间的角度表示中，统计不确定性约为3%，系统不确定性为2 - 3%。此前三体正电子素衰变的Dalitz图研究较少，此次新测量结果与Dalitz图的领先阶和次领先阶QED预测一致。

英文摘要

We present the first measurements of the Dalitz plot for ortho-positronium annihilation to three photons. Our measurements, accurate to about 3% statistical and 2-3% systematic uncertainty in angular representation over almost the entire available phase space, were performed using the Jagiellonian Positron Emission Tomograph (J-PET) based on organic scintillator strips. Until now, the Dalitz plot for the three-body positronium decay has been poorly explored. The new measurements presented here are consistent with both the leading-order and next-to-leading order QED predictions for the Dalitz plot.