Strong decays of excited 2+ charmed mesons
Strong decays of excited 2+ charmed mesons
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DOI：
10.1103/physrevd.105.094019
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发表时间：
2022-03
影响因子：
5
通讯作者：
Xiao-Ze Tan;Tianhong Wang;Yue Jiang;Qiang Li;L. Huo;Guo-Li Wang
中科院分区：
文献类型：
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作者：
Xiao-Ze Tan;Tianhong Wang;Yue Jiang;Qiang Li;L. Huo;Guo-Li Wang
LHC B合作组在$ B $衰变中观测到了新的粲共振$D_2 ^*（3000）$。本文将其指定为$2 ^+ $族的四个可能激发态，用瞬时Bethe-Salpeter方法计算了它们的Okubo-Zweig-Iizuka允许的两体强衰变.对$1^3F_2 $和$3^3P_2 $态的计算结果偏离了目前的实验观测，而$2^3P_2 $和$2^3F_2 $态的计算结果在误差范围内。我们的研究还表明，这些状态的宽度很大程度上取决于质量。由于模型的不确定性较大，且质量输入不同，目前各种模型得到的结论不一致。本文的分析可为今后的测量和研究提供必要的帮助。
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.