Molecular pentaquarks with hidden charm and double strangeness

被引：3

作者：

Roca, L. ^{[1
]}

Song, J. ^{[2
,3
,4
]}

Oset, E. ^{[3
,4
]}

机构：

[1] Univ Murcia, Dept Fis, E-30100 Murcia, Spain

[2] Beihang Univ, Sch Phys, Beijing 102206, Peoples R China

[3] Ctr Mixto Univ Valencia, CSIC Inst Invest Paterna, Dept Fis Teor, Apartado 22085, Valencia 46071, Spain

[4] Ctr Mixto Univ Valencia, CSIC Inst Invest Paterna, IFIC, Apartado 22085, Valencia 46071, Spain

来源：

PHYSICAL REVIEW D | 2024年 / 109卷 / 09期

基金：

中国国家自然科学基金; 欧盟地平线“2020”; 中国博士后科学基金;

关键词：

EFFECTIVE CHIRAL LAGRANGIANS; MESON; BARYONS; STATES; DYNAMICS;

D O I：

10.1103/PhysRevD.109.094005

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze theoretically the coupled-channel meson-baryon interaction with global flavor c<overline>cssn and c<overline>csss, where mesons are pseudoscalars or vectors, and baryons have JP = 1/2+ or 3/2+. The aim is to explore whether the nonlinear dynamics inherent in the unitarization process within coupled channels can dynamically generate double- and triple-strange pentaquark-type states (Pcss and Pcsss, respectively), for which there is no experimental evidence to date. We evaluate the s-wave scattering matrix by implementing unitarity in coupled channels, using potential kernels obtained from t-channel vector meson exchange. The required PPV and VVV vertices are obtained from Lagrangians derived through appropriate extensions of the local hidden gauge symmetry approach to the charm sector, while capitalizing on the symmetry of the spin and flavor wave function to evaluate the BBV vertex. We find four different poles in the double strange sector, some of them degenerate in spin. For the triple-strange channel, we find the meson-baryon interaction insufficient to generate a bound or resonance state through the unitary coupled-channel dynamics.

引用

页数：8

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