论文标题
在$γπ^{\ pm} $中，访问手性的夸克广义分布，在固定目标和对撞机实验中具有较大的不变质量
Accessing chiral-even quark generalised parton distributions in the exclusive photoproduction of a $ γπ^{\pm} $ pair with large invariant mass in both fixed-target and collider experiments
论文作者
论文摘要
我们在运动型在这对具有较大不变质量的运动学方面，计算使用共线分解框架的$γ\，π^\ pm $对的独家光生源。这个独家渠道为调查GPD提供了新的途径。这特别有趣，因为将来的实验中可用的高质量能量中心将允许在小偏度$ξ$上研究GPD。我们在$α_s$中计算该过程的散射幅度，在$α_s$中的领先扭曲和领先顺序上，该过程用于估计其相对于传入光子的横截面和线性极化不对称的不对称，对于JLAB〜GEV，Compass，Compass，Future EIC，Future EIC，Future EIC和LHC（在超级期限碰撞中）kinematics。我们发现，估计值的数量级足够大，可以进行专用的实验分析，尤其是在JLAB上。我们还将渐近分布幅度（DA）的结果与使用最近提出的\ textit {全息} da的结果进行了比较。
We compute the exclusive photoproduction of a $γ\,π^\pm$ pair using the collinear factorisation framework, in the kinematic regime where the pair has a large invariant mass. This exclusive channel presents a new avenue for the investigation of GPDs. It is particularly interesting as the high centre of mass energies available at future experiments will allow the study of GPDs at small skewness $ ξ$. We compute the scattering amplitude of the process, at leading twist and leading order in $α_s$, which is used to estimate its cross-section and linear polarisation asymmetries with respect to the incoming photon, for JLab~12-GeV, COMPASS, future EIC and LHC (in ultra-peripheral collisions) kinematics. We find that the order of magnitude of estimates are sufficiently large for a dedicated experimental analysis to be performed, especially at JLab. We also compare the results from an asymptotic distribution amplitude (DA) to those using a recently proposed \textit{holographic} DA.
