LOW-ENERGY THEOREM FOR SCALAR AND VECTOR INTERACTIONS OF A COMPOSITE SPIN-1/2 SYSTEM

被引：16

作者：

WALLACE, SJ

GROSS, F

TJON, JA

机构：

[1] UNIV MARYLAND, CTR THEORET PHYS, COLLEGE PK, MD 20742 USA

[2] COLL WILLIAM & MARY, DEPT PHYS, WILLIAMSBURG, VA 23185 USA

[3] CONTINUOUS ELECTRON BEAM ACCELERATOR FACIL CTR, NEWPORT NEWS, VA 23606 USA

[4] UNIV UTRECHT, INST THEORET PHYS, 3508 TA UTRECHT, NETHERLANDS

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.74.228

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Scalar and vector interactions, with the scalar interaction coupled to a composite spin-1/2 system so as to cause a shift of its mass, are shown to obey a low-energy theorem which guarantees that the second order interaction due to Z graphs is the same as for a point Dirac particle. Off-shell and contact interactions appropriate to the composite system cancel, and this is verified in a model of a composite fermion. The result suggests a justification for the use of the Dirac equation as it has been used in relativistic nuclear scattering and mean field theories. © 1995 The American Physical Society.

引用

页码：228 / 230

页数：3

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