Dynamically generated JP=1/2-(3/2-) singly charmed and bottom heavy baryons

被引：69

作者：

Lu, Jun-Xu ^{[1
,2
]}

Zhou, Yu ^{[1
,2
]}

Chen, Hua-Xing ^{[1
,2
]}

Xie, Ju-Jun ^{[3
]}

Geng, Li-Sheng ^{[1
,2
]}

机构：

[1] Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China

[2] Beihang Univ, Int Res Ctr Nuclei & Particles Cosmos, Beijing 100191, Peoples R China

[3] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

来源：

PHYSICAL REVIEW D | 2015年 / 92卷 / 01期

基金：

中国国家自然科学基金;

关键词：

CHIRAL PERTURBATION-THEORY; LARGE-N-C; RESONANCES; STATES; ASTERISK; A(0)(980); F(0)(980); SYMMETRY; DECAYS; MESONS;

D O I：

10.1103/PhysRevD.92.014036

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Approximate heavy-quark spin and flavor symmetry and chiral symmetry play an important role in our understanding of the nonperturbative regime of strong interactions. In this work, utilizing the unitarized chiral perturbation theory, we explore the consequences of these symmetries in the description of the interactions between the ground-state singly charmed (bottom) baryons and the pseudo-Nambu-Goldstone bosons. In particular, at leading order in the chiral expansion, by fixing the only parameter in the theory to reproduce the Lambda(b)(5912) [Lambda(b)*(5920)] or the Lambda(c)(2595) [Lambda(c)*(2625)], we predict a number of dynamically generated states, which are contrasted with those of other approaches and available experimental data. In anticipation of future lattice QCD simulations, we calculate the corresponding scattering lengths and compare them to the existing predictions from a O(p(3)) chiral perturbation theory study. In addition, we estimate the effects of the next-to-leading-order potentials by adopting heavy-meson Lagrangians and fixing the relevant low-energy constants using either symmetry or naturalness arguments. It is shown that higher-order potentials play a relatively important role in many channels, indicating that further studies are needed once more experimental or lattice QCD data become available.

引用

页数：16

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