论文标题
库仑核干扰作用在超递封型重离子碰撞中产生的二维
Coulomb nuclear interference effect in dipion production in ultraperipheral heavy ion collisions
论文作者
论文摘要
我们研究了超递高离子碰撞中的$ρ^0 $ρ^0 $ρ^0 $共振峰的独家$π^+π^ - $对生产。可以通过两个光子融合过程或从光子 - 核反应中的$ρ^0 $的衰减产生茶对。在非常低对的横向动量下，电磁和核幅度变得可比。我们表明，库仑核干扰幅度产生了相当大的$ \ cos ϕ $和$ \ cos 3ϕ $方位角的不对称，可用于约束偶极 - 核螺旋散射幅度的相位。
We study exclusive $π^+ π^-$ pair production near $ρ^0$ resonance peak in ultraperipheral heavy ion collisions. Pion pair can either be produced via two photon fusion process or from the decay of $ρ^0$ in photon-nuclear reaction. At very low pair transverse momentum, the electromagnetic and nuclear amplitudes become comparable. We show that the Coulomb nuclear interference amplitude gives rise to sizable $\cos ϕ$ and $\cos 3ϕ$ azimuthal asymmetries, which can be used to constrain the phase of the dipole-nucleus scattering amplitude.
