Definition of the Δ mass and width

被引：17

作者：

Djukanovic, D. ^{[1
]}

Gegelia, J.

Scherer, S.

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany

[2] Tbilisi State Univ, Inst High Energy Phys, Tbilisi, Georgia

来源：

PHYSICAL REVIEW D | 2007年 / 76卷 / 03期

关键词：

D O I：

10.1103/PhysRevD.76.037501

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In the framework of effective field theory we show that, at two-loop order, the mass and width of the Delta resonance defined via the (relativistic) Breit-Wigner parametrization both depend on the choice of field variables. In contrast, the complex-valued position of the pole of the propagator is independent of this choice.

引用

页数：3

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