X0(2900)and X1(2900):Hadronic Molecules or Compact Tetraquarks  

作　　者：Hua-Xing Chen Wei Chen Rui-Rui Dong Niu Su 陈华星;陈伟;董瑞瑞;苏妞(School of Physics,Southeast University,Nanjing 210094,China;School of Physics,Sun Yat-Sen University,Guangzhou 510275,China;School of Physics,Beihang University,Beijing 100191,China)

机构地区：[1]School of Physics,Southeast University,Nanjing 210094,China [2]School of Physics,Sun Yat-Sen University,Guangzhou 510275,China [3]School of Physics,Beihang University,Beijing 100191,China

出　　处：《Chinese Physics Letters》2020年第10期12-16,共5页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Grant Nos.11722540 and 12075019);the Fundamental Research Funds for the Central Universities

摘　　要：Very recently the LHCb collaboration reported their observation of the first two fully open-flavor tetraquark states,the X 0(2900)of J P=0^+and the X 1(2900)of J P=1^−.We study their possible interpretations using the method of QCD sum rules,paying special attention to an interesting feature of this experiment that the higher resonance X 1(2900)has a width significantly larger than the lower one X 0(2900).Our results suggest that the X 0(2900)can be interpreted as the s-wave D∗−K∗+molecule state of J P=0^+,and the X 1(2900)can be interpreted as the p-wave¯c¯s u d compact tetraquark state of J P=1^−.Mass predictions of their bottom partners are also given.

关 键 词：QUARK WAVE state 

分 类 号：O572.33[理学—粒子物理与原子核物理]