| 1P波激发态粲介子和底介子的质量劈裂 |
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| 引用本文： | 梅青,宋永新,贾多杰. 1P波激发态粲介子和底介子的质量劈裂[J]. 原子核物理评论, 2022, 39(1): 30-36. DOI: 10.11804/NuclPhysRev.39.2022001 |
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| 作者姓名： | 梅青 宋永新 贾多杰 |
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| 作者单位： | 1.西北师范大学物理与电子工程学院, 兰州 730070 |
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| 基金项目： | 国家自然科学基金资助项目(12165017) |
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| 摘 要： | 应用线性Regge轨迹和相对论夸克模型,研究了低激发态单重介子谱,并解释了这些激发态的窄质量劈裂源自轻夸克的相对论效应.计算了自旋宇称为J+(J=0,1,2)的单重介子(D,Ds,B,Bs)P波的质量,并建议存在O+态的,未被实验发现的B介子和Bs介子,其质量分别为5659 MeV和5788 MeV.计算表明,Ds0(...
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| 关 键 词： | Regge轨迹 唯象模型 重轻介子 |
| 收稿时间： | 2022-01-02 |
Mass Splitting of Excited Charmed and Bottom Mesons in 1P Wave |
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| Qing MEI,Yongxin SONG,Duojie JIA. Mass Splitting of Excited Charmed and Bottom Mesons in 1P Wave[J]. Nuclear Physics Review, 2022, 39(1): 30-36. DOI: 10.11804/NuclPhysRev.39.2022001 |
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| Authors: | Qing MEI Yongxin SONG Duojie JIA |
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| Affiliation: | 1.Institute of Theoretical Physics, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China2.Lanzhou Center for Theoretical Physics, Lanzhou University, Lanzhou, 730000, China |
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| Abstract: | We apply linear Regge trajectory and relatived quark model to revisit the low-lying excited singly-heavy mesons and explain the narrow mass splitting of these excited states to arise mainly from relativistic effect of the light quarks. The P-wave masses of the singly heavy mesons (D, $ {D_s} $, B, $ {B_s} $) with spin-parity $ {J^ + } $($ J = 0 $, $ 1 $, $ 2 $) have been computed, suggesting the unseen states of the mesons B and $ {B_s} $ to be the $ {0^ + } $ state with mass 5 659 and 5 788 MeV, respectively. Our calculations show that $ {D_{s{text{0}}}}left( {{text{2;317}}} right) $ contains a mass downshift of around 70 MeV while $ {D_{s{text{1}}}}left( {{text{2;460}}} right) $ has no significant mass shift. |
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