在$\bar{p}p\to J/ψπ^0$的PANDA测量$πN$ TDAs的可行性研究
Feasibility study for the measurement of $πN$ TDAs at PANDA in $\bar{p}p\to J/ψπ^0$
摘要：
在QCD共线因子分解框架下研究了$\bar{p}p$与伴随的$π^0$介子$\bar{p}p\to J/ψπ^0$湮灭过程中粲偶素的唯一产生过程.研究了利用PANDA（AntiProton Annihilation at DArmstadt）实验通过$J/ψ\to e^+e^-$衰变通道测量该反应的可行性。利用PANDA实验的模拟分析软件PandaRoot，对$\bar{p}p\toπ^+π^-π^0$和$\bar{p}p\to J/ψπ^0π^0$反应的信号重建效率和背景抑制进行了模拟。它表明，测量可以在PANDA与显着的约束力的假设下，积分亮度可达到在四到五个月的数据，在最大设计光度。
英文摘要：
The exclusive charmonium production process in $\bar{p}p$ annihilation with an associated $π^0$ meson $\bar{p}p\to J/ψπ^0$ is studied in the framework of QCD collinear factorization. The feasibility of measuring this reaction through the $J/ψ\to e^+e^-$ decay channel with the PANDA (AntiProton ANnihilation at DArmstadt) experiment is investigated. Simulations on signal reconstruction efficiency as well as the background rejection from various sources including the $\bar{p}p\toπ^+π^-π^0$ and $\bar{p}p\to J/ψπ^0π^0$ reactions are performed with PandaRoot, the simulation and analysis software framework of the PANDA experiment. It is shown that the measurement can be done at PANDA with significant constraining power under the assumption of an integrated luminosity attainable in four to five months of data taking at the maximum design luminosity.
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