The reaction πN → ππN in chiral effective field theory with explicit Δ(1232) degrees of freedom

被引：14

作者：

Siemens, D. ^{[1
]}

Bernard, V. ^{[2
]}

Epelbaum, E. ^{[1
]}

Krebs, H. ^{[1
]}

Meissner, Ulf-G. ^{[3
,4
,5
,6
]}

机构：

[1] Ruhr Univ Bochum, Inst Theoret Phys 2, D-44780 Bochum, Germany

[2] Univ Paris 11, CNRS, Inst Phys Nucl, UMR 8608, F-91406 Orsay, France

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

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

[5] Julich Ctr Hadron Phys, Inst Adv Simulat, Inst Kernphys, D-52425 Julich, Germany

[6] Forschungszentrum Julich, JARA High Performance Comp, D-52425 Julich, Germany

来源：

PHYSICAL REVIEW C | 2014年 / 89卷 / 06期

关键词：

PERTURBATION-THEORY; LOW-ENERGY; NUCLEON-SCATTERING; DELTA-EXCITATIONS; DEPENDENCE; COUPLINGS; THRESHOLD; FORCES; ORDER; MASS;

D O I：

10.1103/PhysRevC.89.065211

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The reaction pi N -> pi pi N is studied at tree level up to next-to-leading order in the framework of manifestly covariant baryon chiral perturbation theory with explicit Delta(1232) degrees of freedom. Using total cross-section data to determine the relevant low-energy constants, predictions are made for various differential as well as total cross sections at higher energies. A detailed comparison of results based on the heavy-baryon and relativistic formulations of chiral perturbation theory with and without explicit Delta degrees of freedom is given.

引用

页数：19

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