论文标题
大摩托木马的分离横截面，带有光介子
Dissociation Cross Sections of Large-Momentum Charmonia with Light Mesons in Hadronic Matter
论文作者
论文摘要
在大型强子对撞机的PB-PB碰撞中产生的charmonia动量是如此之大，以至于当Charmonia与Handronic物质中的轻中介相撞时，可能会产生三个或更多的介子。我们以一种机制研究了介子 - charmonium碰撞，碰撞产生了两个夸克和两个古夸克，魅力夸克随后碎裂成魅力的介子，其他三个组成部分以及由真空产生的夸克和古quark虫产生了两个或更多的mesons。生产两个夸克和两个古玩的过渡幅度的绝对平方是从$ s $ -matrix元素得出的，横截面公式源自过渡幅度的绝对平方和过渡幅度的绝对平方和Charm-Quark碎片函数。凭借温度依赖夸克的电势，我们计算了包含$ d^+$，$ d^0 $，$ d^+_ s $的未偏度横截面，或$ d^{*+} $生产Charmonia charmonia by $π$，$ρ$，$ K $，或$ k $ k $ k^\ ast ast $ mesons的散射。在低质量中心能量和浅膜的质量中心能量下，横截面很小。在高能量下，横截面具有明显的温度依赖性，并且与两到两个介子 - charmonium反应的峰值横截面相媲美。
Momenta of charmonia created in Pb-Pb collisions at the Large Hadron Collider are so large that three or more mesons may be produced when the charmonia collide with light mesons in hadronic matter. We study the meson-charmonium collision in a mechanism where the collision produces two quarks and two antiquarks, the charm quark then fragmenting into charmed mesons, and the other three constituents as well as quarks and antiquarks created from vacuum give rise to two or more mesons. The absolute square of the transition amplitude for the production of two quarks and two antiquarks is derived from the $S$-matrix element, and cross-section formulas are derived from the absolute square of the transition amplitude and charm-quark fragmentation functions. With a temperature-dependent quark potential, we calculate unpolarized cross sections for inclusive $D^+$, $D^0$, $D^+_s$, or $D^{*+}$ production in scattering of charmonia by $π$, $ρ$, $K$, or $K^\ast$ mesons. At low center-of-mass energies of the charmonium and the light meson, the cross sections are very small. At high energies the cross sections have obvious temperature dependence, and are comparable to peak cross sections of two-to-two meson-charmonium reactions.
