论文标题
反应$ e^ + e^ - \ to n + \ bar n +π^0 $在反应中不变变量上的双重和单个差分变量对双重和单个差分变量的贡献
Contribution of the non-resonant mechanism to the double and single differential distributions over the invariant variables in the reaction $e^+ + e^- \to N + \bar N +π^0$
论文作者
论文摘要
假设通过一个虚拟光子的交换发生歼灭，对差异横截面和各种极化可观察的一般分析进行了$ e^ + + e^ - \ to n + bar n +π^0 $进行的一般分析。在所谓的非谐振机制中，差异分布对不变变量的依赖性是针对反应$ e^ + + e^ - \ to N + \ bar n +π^0 $的依赖性，并应用了强子电磁电流和HADRON电子电磁技术的P电源的保护。在一个独家实验设置中的检测，其中考虑了核子（或抗核子）和亲核的一致性检测。已经通过分析计算了许多单个和双重差分分布，并给出了$ p \ barpπ^0 $和$ n \ barnπ^0 $通道的数值估计值，在天生（非谐波）近似中，在阈值范围内，最高为$ s = $ s = 16 $ gev $^$^2 $。
The general analysis of the differential cross section and various polarization observables is performed for the process $e^+ + e^- \to N + \bar N +π^0 $ assuming that the annihilation occurs through the exchange of one virtual photon. The dependence of the differential distributions over invariant variables is derived for the reaction $e^+ + e^- \to N + \bar N +π^0 $ in the so-called non-resonant mechanism, applying the conservation of the hadron electromagnetic currents and the P-invariance of the hadron electromagnetic interaction. The detection in an exclusive experimental set up where the nucleon (or antinucleon) and pion are detected in coincidence is considered. A number of single and double differential distributions have been calculated analytically and numerical estimates are given for the $p\bar pπ^0$ and $n\bar nπ^0$ channels, in the Born (non-resonant) approximation, in the energy range from threshold up to $s=16$ GeV$^2$.
