Analysis of the 1S and 2S states of AQ and ΘQ with QCD sum rules

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: PARTICLES AND FIELDS
• 页码范围: 109-118
• 页数: 10页
• 语种: 英文
• DOI: 10.1088/1674-1137/abc1d3

摘要

In this article,we study the ground states and the first radial excited states of the flavor antitriplet heavy baryon states AQ and ΘQ with the spin-parity JP =1/2+by carrying out operator product expansion up to vacuum condensates of dimension 10 in a consistent way.We observe for the first time that the higher dimensional vacuum condensates play an important role,and obtain very stable QCD sum rules with variations of the Borel parameters for the heavy baryon states.The predicted masses 6.08 ±0.09GeV,2.78±0.08GeV,and 2.96±0.09GeV for the first radial excited states Ab(2S),Ac(2S),and Θc(2S),respectively,are in excellent agreement with the experiment-al data and support assigning Ab(6072),Ac(2765),and Θc(2980/2970)to be the first radial excited states of Ab,Ac,and Θc,respectively.The predicted mass 6.24±0.07 GeV for Θb(2S)can be confirmed using experimental data in the future.