论文标题
测试pion诱导的$ ϕ $ ϕ $ meson生产的$ ϕ $ - 核潜力，接近阈值
Testing the $ϕ$-nuclear potential in pion-induced $ϕ$ meson production on nuclei near threshold
论文作者
论文摘要
使用基于核光谱功能的碰撞模型，已经在Hades实验的运动条件下研究了接近阈值触发的$ ϕ $生产核的生产。从基本反应$ {π^ - } p \到ϕn $开始，已经计算出来并与最近报道的实验横截面相比，已经计算出来并进行了相比，已经计算了并相比，已经计算出了$ ϕ $介子的绝对差分和积分横截面。绝对横截面值显示对有效的核标量$ ϕ $和中子电势敏感，而透明度比受$ ϕn $吸收横截面的控制。发现实验数据与正常核物质密度$ρ_0$和有效的$ ϕn $吸收交叉部分$ \ $ \ $ \ $ 12--25 MB的有吸引力的$ ϕ $ -Nucleus潜力$ \ $ - （50--100）MEV。提取的$ ϕ $ -Nucleus电位比以前的理论和实验性发现更深，以及在（$tρ$）近似值中在本工作中获得的，这些发现是从最近在Alice实验中报道的自旋平均$ ϕ $ -P $散射长度的Pauli相关性的。
The near-threshold pion-induced $ϕ$ production off nuclei has been studied in the kinematical conditions of the HADES experiment using a collision model based on the nuclear spectral function. Starting from the elementary reaction ${π^-}p \to ϕn$, absolute differential and integral cross sections for the production of $ϕ$ mesons off a light carbon and a heavy tungsten target have been calculated and compared to the recently reported experimental cross sections. The absolute cross section values are shown to be sensitive to the effective nuclear scalar $ϕ$ and neutron potentials while the transparency ratio is governed by the $ϕN$ absorption cross section. The experimental data are found to be consistent with an attractive $ϕ$-nucleus potential of $\approx$ -(50--100) MeV at normal nuclear matter density $ρ_0$ and an effective $ϕN$ absorption cross section of $\approx$ 12--25 mb. The extracted $ϕ$-nucleus potential is deeper than previous theoretical and experimental findings as well as those obtained in the present work within the ($tρ$) approximation with accounting for Pauli correlations from the spin-averaged $ϕ$-$p$ scattering length reported in a recent ALICE experiment.
