Meson-baryon scattering up to the next-to-next-to-leading order in covariant baryon chiral perturbation theory

被引：12

作者：

Lu, Jun-Xu ^{[1
,2
,3
,4
]}

Geng, Li-Sheng ^{[1
,2
,3
]}

Ren, Xiu-Lei ^{[5
]}

Du, Meng-Lin ^{[6
,7
]}

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] Beihang Univ, Beijing Key Lab Adv Nucl Mat & Phys, Beijing 100191, Peoples R China

[4] Univ Paris Sud 11, Grp Phys Theor, IPN UMR8608, F-91406 Orsay, France

[5] Ruhr Univ Bochum, Fak Phys & Astron, Inst Theoret Phys 2, D-44780 Bochum, Germany

[6] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany

[7] Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany

来源：

PHYSICAL REVIEW D | 2019年 / 99卷 / 05期

基金：

中国国家自然科学基金;

关键词：

PION-NUCLEON SCATTERING; N-SCATTERING; EXPANSIONS; DYNAMICS; MASS;

D O I：

10.1103/PhysRevD.99.054024

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the scattering of a pseudoscalar meson off one ground state octet baryon up to the next-to-next-to-leading order in covariant baryon chiral perturbation theory (BChPT) with the extended-on-mass-shell scheme. We perform the first combined study of the pion-nucleon and kaon-nucleon scattering data in covariant BChPT and show that it can provide a reasonable description of the experimental data. In addition, we find that it is possible to fit the experimental baryon masses and the pion-nucleon and kaon-nucleon scattering data simultaneously at this order, thus providing a consistency check on covariant BChPT. We compare the scattering lengths of all the pertinent channels with available experimental data and those of the heavy baryon ChPT and infrared BChPT and discuss the convergence of SU(3) BChPT.

引用

页数：17

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