论文标题
在伽玛 - 普罗顿碰撞中的$ρ$梅森的独家生产：$dσ/dt $和螺旋性翻转过程的作用
Exclusive production of $ρ$ meson in gamma-proton collisions: $d σ/dt$ and the role of helicity flip processes
论文作者
论文摘要
我们计算衍射光增生过程$γp\ toρp$的差分横截面$dσ/dt $，并将其与从超疗法质子铅胶碰撞的CMS协作提取的最新数据进行了比较。我们的模型基于非扰动域中的两种浓度交换。我们考虑了螺旋性保存和经常被忽视的$γ\ to v $过渡中的螺旋翼弹簧。这封信可以以有限的$ t $贡献。差分横截面的形状以及螺旋性翻转过程的作用与非扰动区域中未集成的gluon分布对横向动量的依赖性密切相关。
We calculate the differential cross section $dσ/dt$ for the diffractive photoproduction process $γp \to ρp$ and compare to recent data extracted by the CMS collaboration from ultraperipheral proton-lead collisions. Our model is based on two-gluon exchange in the nonperturbative domain. We take into account both helicity conserving and often neglected helicity-flip amplitudes in the $γ\to V$ transition. The letter can contribute at finite $t$. The shape of the differential cross section as well as the role of helicity flip processes is strongly related to the dependence of the unintegrated gluon distribution on transverse momenta in the nonperturbative region.
