Doubly charmed pentaquark states in QCD sum rules

被引:3
|
作者
Duan, Feng-Bo [1 ]
Wang, Qi-Nan [1 ]
Yang, Zi-Yan [3 ,4 ]
Chen, Xu-Liang [1 ]
Chen, Wei [1 ,2 ]
机构
[1] Sun Yat Sen Univ, Sch Phys, Guangzhou 510275, Peoples R China
[2] Chinese Acad Sci, Inst Modern Phys, Southern Ctr Nucl Sci Theory SCNT, Huizhou 516000, Guangdong, Peoples R China
[3] South China Normal Univ, Inst Quantum Matter, Guangdong Basic Res Ctr Excellence Struct & Fundam, Key Lab Atom & Subatom Struct & Quantum Control,MO, Guangzhou 510006, Peoples R China
[4] South China Normal Univ, Southern Nucl Sci Comp Ctr, Guangdong Hong Kong Joint Lab Quantum Matter, Guangdong Prov Key Lab Nucl Sci, Guangzhou 510006, Peoples R China
基金
国家重点研发计划; 中国国家自然科学基金;
关键词
SYMMETRY-BREAKING; BARYON MASSES; RESONANCE;
D O I
10.1103/PhysRevD.109.094018
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We have studied the mass spectra of doubly charmed pentaquark states in the Lambda () c D () and Sigma () c D () channels with J P 1 / 4 1 = 2 , 3 = 2 , and 5 = 2 within the framework of quantum chromodynamics sum rules. We use the parity projected sum rules to separate the contributions of negative and positive parities from the two -point correlations induced by the pentaquark interpolating currents. Our results show that the bound states of P cc pentaquarks may exist in the Lambda c D ( 1 - ) , Sigma c D ( 1 - ) , Sigma c D ( 3 - ) , Lambda c D ( 3 - ) , Lambda c D ( 5 - ) channels with 2 2 2 2 2 negative -parity and Sigma c D ( 1 + ) , Sigma c D ( 3 + ) , Sigma c D ( 3 + ) channels with positive -parity, since their masses are 2 2 2 predicted to be lower than the corresponding meson -baryon thresholds. However, they are still allowed to decay into the Xi () cc pi final states via strong interaction. The triply charged P +++ cc ( ccuud ) and neutral P 0 cc ( ccddu ) in the isospin quartet would definitely be pentaquark states due to their exotic charges. We suggest searching for these characteristic doubly charmed pentaquark signals in the P +++ cc -> Xi ()++ cc pi + = rho + , Sigma ()++ c D ()+ and P 0 cc -> Xi ()+ cc pi - = rho - , Sigma () 0 c D () 0 decays in the near future.
引用
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页数:27
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