论文标题
$π-δ（1232）$最终状态的过渡GPD和独家电源
Transition GPDs and exclusive electroproduction of $π-Δ(1232)$ final states
论文作者
论文摘要
我们调查了手袋方法中$π^-Δ^{++} $的独家电力增生，在该方法中，螺旋幅度幅度分解为通用的Parton分布（GPD）和硬partononic子过程。我们定义$ p-δ$ trant术GPD，而螺旋性非flip GPD则从文献中获取。对于可观察到的数值估计，我们使用了大型$ N_C $结果，以将$ p-δ$ GPD的一些GPD与Proton-Proton的一些相关联并忽略所有其他GPD。在计算Twist-2和Twist-3子过程振幅中，我们考虑到Quark Transversemma，并结合Sudakov抑制。 $γ^*p \至π^-Δ^{++} $的部分横截面在大$ n_c $限制中预测。
We investigate exclusive electroproduction of $π^-Δ^{++}$ within the handbag approach in which the helicity amplitudes factorize into generalized parton distributions (GPDs) and hard partonic subprocesses. We define the $p-Δ$ transversity GPDs while the helicity non-flip GPDs are taken from the literature. For the numerical estimates of observables we utilize large-$N_C$ results in order to relate a few of the $p-Δ$ GPDs to the proton-proton ones and neglect all other GPDs. In the calculation of the twist-2 and twist-3 subprocess amplitudes we take into account quark transverse momenta in combination with Sudakov suppressions. The partial cross sections for $γ^*p\to π^-Δ^{++}$ are predicted in the large-$N_C$ limit.
