论文标题
强烈的衰败$ 2^+ $ charmed介子
Strong decays of excited $ 2^+ $ charmed mesons
论文作者
论文摘要
LHCB合作在$ b $衰减中观察到了新的Charmed共鸣$ D_2^*（3000）$。在本文中，通过将其分配为$ 2^+ $家族的四个可能的激发态，我们使用瞬时的伯特 - 盐分方法来计算其Okubo-Zweig-iizuka允许的两体强衰减。 $ 1^3f_2 $和$ 3^3p_2 $状态的结果与当前的实验观察偏离，而$ 2^3p_2 $和$ 2^3f_2 $的结果在错误范围内。我们的研究还表明，这些状态的宽度在很大程度上取决于质量。由于较大的不确定性和不同的质量输入，可变模型目前会得出不一致的结论。这项工作的分析可以为将来的测量和调查提供基本的帮助。
The new charmed resonance $ D_2^*(3000) $ was observed by the LHCb Collaboration in $ B $ decays. In this paper, by assigning it as four possible excited states of the $ 2^+ $ family, we use the instantaneous Bethe-Salpeter method to calculate their Okubo-Zweig-Iizuka-allowed two-body strong decays. The results of $ 1^3F_2 $ and $ 3^3P_2 $ states deviate from the present experimental observation while $ 2^3P_2 $ and $ 2^3F_2 $ are in the error range. Our study also reveals that the widths of these states depend strongly on the masses. Due to the large uncertainties and different mass input, variable models get inconsistent conclusions at the moment. The analysis in this work can provide essential assistance for future measurements and investigations.
