Effective theory approach to unstable particle production

被引：75

作者：

Beneke, M ^{[1
]}

Chapovsky, AP

Signer, A

Zanderighi, G

机构：

[1] Rhein Westfal TH Aachen, Inst Theoret Phys E, D-52056 Aachen, Germany

[2] Univ Durham, Dept Phys, IPPP, Durham DH1 3LE, England

[3] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.93.011602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using the hierarchy of scales between the mass M and the width Gamma of a heavy, unstable particle, we construct an effective theory that allows calculations for resonant processes to be systematically expanded in powers of the coupling alpha and Gamma/M. We illustrate the method by computing the next-to-leading order line shape of a scalar resonance in an Abelian gauge-Yukawa model.

引用

页码：011602 / 1

页数：4

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