Narrow resonances in effective field theory

被引：156
作者：
Bedaque, PF
Hammer, HW
van Kolck, U
机构：
[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA
[2] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, Abt Theor, D-53115 Bonn, Germany
[3] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
[4] Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA
来源：
PHYSICS LETTERS B | 2003年 / 569卷 / 3-4期
关键词：
effective field theory; narrow resonances;
D O I：
10.1016/j.physletb.2003.07.049
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We discuss the power counting for effective field theories with narrow resonances near a two-body threshold. Close to threshold, the effective field theory is perturbative and only one combination of coupling constants is fine-tuned. In the vicinity of the resonance, a second, "kinematic" fine-tuning requires a nonperturbative resummation. We illustrate our results in the case of nucleon-alpha scattering. (C) 2003 Elsevier B.V. All fights reserved.
引用
收藏
页码：159 / 167
页数：9
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