Nuclear Electromagnetic Currents to Fourth Order in Chiral Effective Field Theory

被引：32

作者：

Krebs, H. ^{[1
]}

Epelbaum, E. ^{[1
]}

Meissner, U. -G. ^{[2
,3
,4
,5
,6
]}

机构：

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

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

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

[4] Forschungszentrum Julich, Inst Kernphys, Inst Adv Simulat, D-52425 Julich, Germany

[5] Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany

[6] Tbilisi State Univ, Tbilisi 0186, Georgia

来源：

FEW-BODY SYSTEMS | 2019年 / 60卷 / 02期

关键词：

4-NUCLEON FORCE; LAGRANGIANS; SCATTERING;

D O I：

10.1007/s00601-019-1500-5

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Recently, we have shown that the continuity equation for the nuclear vector and axial current operators acquires additional terms if the latter depend on the energy transfer. We analyze in detail the electromagnetic single-nucleon four-current operators and verify the validity of the modified continuity equation for all one- and two-nucleon contributions up to fourth order in the chiral expansion. We also derive, for the first time, the leading contribution to the three-nucleon charge operator which appears at this order. Our study completes the derivation of the electroweak nuclear currents to fourth order in the chiral expansion.

引用

页数：13

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