One-loop analysis of the interactions between doubly charmed baryons and Nambu-Goldstone bosons

被引：1

作者：

Liang, Ze-Rui ^{[1
]}

Qiu, Peng-Cheng ^{[1
]}

Yao, De-Liang ^{[1
,2
]}

机构：

[1] Hunan Univ, Sch Phys & Elect, Changsha 410082, Peoples R China

[2] Hunan Univ, Hunan Prov Key Lab High Energy Scale Phys & Appli, Changsha 410082, Peoples R China

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2023年 / 2023卷 / 07期

关键词：

Higher-Order Perturbative Calculations; Chiral Lagrangian; Effective Field Theories of QCD; CHIRAL PERTURBATION-THEORY; DISPERSION RELATIONS; REDUCTION; SPECTRUM; MASS;

D O I：

10.1007/JHEP07(2023)124

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The interactions between the spin-1/2 doubly charmed baryons and Nambu-Goldstone bosons are analyzed within a manifestly relativistic baryon chiral perturbation theory up to next-to-next-to leading order, by using the so-called extended-on-mass-shell scheme. We utilize heavy diquark-antiquark symmetry to estimate the low-energy constants in the chiral effective Lagrangians. The S- and P-wave scattering lengths are predicted. We find that those diagrams, vanishing exactly in the heavy-quark limit, do contribute slightly to the S-wave scattering lengths in reality. The influence of the spin-3/2 doubly charmed baryons, as heavy-quark spin partners of the spin-1/2 ones, on the scattering lengths is discussed as well. Finally, S-wave phase shifts for elastic scattering processes are presented in the energy region near threshold. Our results in this work will not only be very useful for performing chiral extrapolations of future lattice QCD data, but also provide us chiral inputs for the investigation of the spectroscopy of doubly heavy baryons.

引用

页数：46

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