论文标题
$γ^*γ\至ππ$的运动学高扭校正校正
Kinematical higher-twist corrections in $γ^* γ\to ππ$
论文作者
论文摘要
我们将Braun-Manashov技术应用于改进$γ^*（q_1）γ（q_2）\的描述到m（p_1）m（p_1）m（p_2）$ amplitudes $ q^2 = -q_1^2 $和小$ s =（q_1+q_2）^2 $。我们为螺旋性振幅的订单$ s/q^2 $和$ m^2 $和$ m^2/q^2 $的运动较高的贡献提供给螺旋性振幅，并估算在Belle和Belle II的运动学中的尺寸。在Belle II.sinse Pion ii.sinse pion GPDS上无法通过实验直接测量$π$ GDAS的量子，以$π$ gdas的方式来调查能量的构造。
We apply the Braun-Manashov technique to improve the description of $γ^*(q_1) γ(q_2) \to M(p_1) M(p_2)$ amplitudes at large $Q^2=-q_1^2$ and small $s=(q_1+q_2)^2$. We derive the kinematical higher-twist contributions of order $s/Q^2$ and $m^2/Q^2$ to the helicity amplitudes and estimate their sizes in the kinematics accessible at Belle and Belle II.Since pion GPDs cannot be directly measured by experiment, $ππ$ GDAs are the best way to investigate the energy-momentum tensor form factors for pions.
