论文标题
在扩展的强子气体中，魅力 - 梅森比率的演变
Evolution of charm-meson ratios in an expanding hadron gas
论文作者
论文摘要
我们研究了由中央重离子碰撞产生的强子气体的动力学冻结后的魅力介子数量的时间演变。 $πd^\ ast \至πd^\ AST $反应率具有$ t $ -CHANNEL的奇异性，可提供与$ d $的热宽度成反比的贡献。 $ d^0 $和$ d^+$生产率的比率与使用测量的$ d^\ ast $分支分数的预测率有显着差异。
We study the time evolution of the numbers of charm mesons after the kinetic freeze-out of the hadron gas produced by a central heavy-ion collision. The $πD^\ast \to πD^\ast$ reaction rates have $t$-channel singularities that give contributions inversely proportional to the thermal width of the $D$. The ratio of the $D^0$ and $D^+$ production rates can differ significantly from those predicted using the measured $D^\ast$ branching fractions.
