The convolution formula for a decay rate

被引：17
|
作者：
Kuksa, VI [1 ]
机构：
[1] Rostov State Univ, Inst Phys, Rostov Na Donu 344090, Russia
来源：
PHYSICS LETTERS B | 2006年 / 633卷 / 4-5期
关键词：
unstable particles; finite-width effect; convolution method; decay-chain method; mass smearing;
D O I：
10.1016/j.physletb.2005.12.002
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The convolution formula is derived within the framework of the decay-chain method for decay channels with three and four particles in a final state. To get this formula exactly for unstable particles of any type one must modify the propagators of vector and spinor fields. In this work we suggest proper modifications and get the convolution formula by direct calculations. It was noted that this approach naturally arises in the model of unstable particles with random mass. (c) 2005 Elsevier B.V. All rights reserved.
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页码：545 / 549
页数：5
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