论文标题
协变性手性扰动理论中的辐射性拓位光生物生产
Radiative pion photoproduction in covariant chiral perturbation theory
论文作者
论文摘要
我们介绍了用显式$δ（1232）$自由度的协变性手性扰动理论的辐射拓光生物生产的计算。使用针对$δ$区域调整的小型扩展方案进行分析。根据渠道，我们将贡献包括到近代到领先的订单。我们为反应$γp\toγpπ^0 $的可用实验数据拟合，并提取$δ^+$磁矩的值。使用贝叶斯方法估计小规模扩张的截断中的错误。我们将我们的结果与$δ$ expansion方案中的先前研究以及$δ$ - 否理论进行了比较。我们还提供了辐射带电光生物生产的预测。
We present a calculation of radiative pion photoproduction in the framework of covariant chiral perturbation theory with explicit $Δ(1232)$ degrees of freedom. The analysis is performed employing the small scale expansion scheme adjusted for the $Δ$ region. Depending on the channel, we include contributions up to next-to-next-to-leading order. We fit the available experimental data for the reaction $ γp\toγpπ^0 $ and extract the value of the $Δ^+$ magnetic moment. Errors from the truncation of the small scale expansion are estimated using the Bayesian approach. We compare our results both with the previous studies within the $δ$-expansion scheme and with the $Δ$-less theory. We also give predictions for radiative charged-pion photoproduction.
