Projection scheme for handling large-number cancellation related to gauge invariance
文献类型：期刊论文
| 作者 | Chang, CH; Ding, YB; Li, XQ; Wang, JX; Zhu, JJ; Chang, CH , CHINA CTR ADV SCI & TECHNOL,WORLD LAB,POB 8730,BEIJING 100080,PEOPLES R CHINA. |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 1996 |
| 卷号 | 54期号:11页码:6963-6969 |
| 关键词 | Top-quark Production Unstable Particles High-energy Collisions Boson Lep200 |
| ISSN号 | 0556-2821 |
| 英文摘要 | A scheme, the so-called ''projection,'' for handling singularities in processes such as e(+)e(-) --> t(b) over bare$(-)<(nu)over bar> (or e(+)e(-) --> u(d) over bare$(-)<(nu)over bar>) is proposed. In the scheme, with the help of gauge invariance, the large power quantities (s/m(e)(2))(n) (n greater than or equal to 1; s --> infinity) are removed from the calculation totally, while in the usual schemes the large quantities appear and only will be canceled at last. The advantages of the scheme in numerical calculations are obvious; thus, we focus our discussions mainly on the advantages of the scheme in the special case where the absorptive part for some propagators relevant to the process could not be ignored, and a not satisfactory but widely adopted approximation is made; i.e., a finite constant ''width'' is introduced to approximate the absorptive part of the propagators phenomenologically even though QED gauge invariance is violated. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| 公开日期 | 2012-08-29 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/12554]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Chang, CH , CHINA CTR ADV SCI & TECHNOL,WORLD LAB,POB 8730,BEIJING 100080,PEOPLES R CHINA. |
| 推荐引用方式 GB/T 7714 | Chang, CH,Ding, YB,Li, XQ,et al. Projection scheme for handling large-number cancellation related to gauge invariance[J]. PHYSICAL REVIEW D,1996,54(11):6963-6969. |
| APA | Chang, CH,Ding, YB,Li, XQ,Wang, JX,Zhu, JJ,&Chang, CH , CHINA CTR ADV SCI & TECHNOL,WORLD LAB,POB 8730,BEIJING 100080,PEOPLES R CHINA..(1996).Projection scheme for handling large-number cancellation related to gauge invariance.PHYSICAL REVIEW D,54(11),6963-6969. |
| MLA | Chang, CH,et al."Projection scheme for handling large-number cancellation related to gauge invariance".PHYSICAL REVIEW D 54.11(1996):6963-6969. |
入库方式： OAI收割
来源：理论物理研究所
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