Doubly heavy tetraquarks in an extended chromomagnetic model

• 作者: Xin-Zhen Weng Wei-Zhen Deng Shi-Lin Zhu
• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: PARTICLES AND FIELDS
• 页码范围: 43-66
• 页数: 24页
• 语种: 英文
• DOI: 10.1088/1674-1137/ac2ed0

摘要

Using an extended chromomagnetic model,we perform a systematic study of the masses of doubly heavy tetraquarks.We find that the ground states of the doubly heavy tetraquarks are dominated by the color-triplet(qq)(3)c ((Q)(Q))3c> configuration,which is opposite to that of fully heavy tetraquarks.The combined results suggest that the color-triplet configuration becomes more important when the mass difference between the quarks and antiquarks increases.We find three stable states that lie below the thresholds of two pseudoscalar mesons.They are the IJP =01+ nn(b)(b) tetraquark,IJP =00+ nn(c)(b) tetraquark,and JP =1+ ns(b)(b) tetraquark.