高阶分波和相对论项对超曲子电产生计算精度的影响
Effects of the higher partial waves and relativistic terms on the accuracy of the calculation of the hypertriton electroproduction
摘要：
本文研究了在超曲子电产生中，忽略核波函数的高次分波和基本相对论项的计算精度。我们发现，如果我们使用至少三个最低的分波，同位旋T = 0，仍然可以得到准确的计算。此外，我们还发现，忽略基元过程振幅中的相对论项会导致与完整计算结果的较大偏差。我们还提出了计算截面所需的CPU时间。为了将来的考虑，建议使用这些最低的分波，因为计算的截面与完整计算的偏差最多仅为0.17 nb/sr（约4%），而CPU时间减少了60倍。我们的结果与现有的实验数据的比较支持这些发现。
英文摘要：
We have investigated the accuracies of calculations made by omitting the higher partial waves of nuclear wave functions and the elementary relativistic terms in the hypertriton electroproduction. We found that an accurate calculation would still be obtained if we used at least three lowest partial waves with isospin T = 0. Furthermore, we found that the omission of the relativistic terms in the elementary process amplitude could lead to a large deviation from the full calculation. We also present the cpu-times required to calculate the cross sections. For future consideration the use of these lowest partial waves is suggested, since the calculated cross section deviates only about 0.17 nb/sr (approximately 4%), at most, from the full calculation, whereas the cpu-time is reduced by a factor of 60. Comparison of our result with the available experimental data supports these findings.
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