论文标题
分析$ \ boldsymbol {γγ\ d \ bar d} $反应和$ d \ bar {d} $绑定状态
Analysis of the $ \boldsymbol{γγ\to D\bar D}$ reaction and the $D\bar{D}$ bound state
论文作者
论文摘要
在这项工作中，我们研究了$γγ\对d \ bar {d} $的反应，并考虑到s-wave $ d \ bar {d} $最终状态相互作用。通过拟合$ d \ bar {d} $由Belle和Babar协作测量的不变质量分布，我们通过$ d \ bar {d} $振幅获得了数据的良好复制，从而产生了$ d \ bar {d} $ i = 0 $ i = 0 $ the threthold。但是，拟合的误差频段表明，需要对该反应的更精确的数据对这种状态的位置和宽度更加自信。
In this work, we investigate the reaction of $γγ\to D\bar{D}$, taking into account the s-wave $D\bar{D}$ final state interaction. By fitting to the $D\bar{D}$ invariant mass distributions measured by the Belle and BaBar Collaborations, we obtain a good reproduction of the data by means of a $D\bar{D}$ amplitude that produces a bound $D\bar{D}$ state with $I=0$ close to threshold. The error bands of the fits indicate, however, that more precise data on this reaction are needed to be more assertive about the position and width of such state.
