Molecular Ωc states generated from coupled meson-baryon channels

被引:62
作者
Debastiani, V. R. [1 ,2 ]
Dias, J. M. [1 ,2 ,3 ]
Liang, W. H. [4 ]
Oset, E. [1 ,2 ]
机构
[1] Univ Valencia, CSIC, Inst Invest Paterna, Ctr Mixto,Dept Fis Teor, Aptdo 22085, Valencia 46071, Spain
[2] Univ Valencia, CSIC, Inst Invest Paterna, Ctr Mixto,IFIC, Aptdo 22085, Valencia 46071, Spain
[3] Univ Sao Paulo, Inst Fis, Rua Matao 1371, BR-05508090 Sao Paulo, SP, Brazil
[4] Guangxi Normal Univ, Dept Phys, Guilin 541004, Peoples R China
基金
巴西圣保罗研究基金会; 中国国家自然科学基金;
关键词
CHIRAL LAGRANGIANS; HEAVY BARYONS; GAUGE BOSON; CHARM;
D O I
10.1103/PhysRevD.97.094035
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We have investigated Omega(c) states that are dynamically generated from the meson-baryon interaction. We use an extension of the local hidden gauge to obtain the interaction from the exchange of vector mesons. We show that the dominant terms come from the exchange of light vectors, where the heavy quarks are spectators. This has as a consequence that heavy quark symmetry is preserved for the dominant terms in the (1/m(Q)) counting, and also that the interaction in this case can be obtained from the SU(3) chiral Lagrangians. We show that for a standard value for the cutoff regulating the loop, we obtain two states with J(P) = 1/2(-) and two more with J(P) = 3/2(-), three of them in remarkable agreement with three experimental states in mass and width. We also make predictions at higher energies for states of vector-baryon nature.
引用
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页数:11
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