NRQCD factorization and universality of NRQCD matrix elements
文献类型：期刊论文
| 作者 | Si, ZG; Ma, JP ; Ma, JP , Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China.
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| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2005 |
| 卷号 | 625期号:40910页码:67-75 |
| 关键词 | To-leading Order Root S=1.8 Tev Heavy Quarkonium p(p)Over-bar Collisions Gluon Fragmentation J/psi Qcd Annihilation Decay |
| ISSN号 | 0370-2693 |
| 英文摘要 | The approach of nonrelativistic QCD (NRQCD) factorization was proposed to study inclusive production of a quarkonium. It is widely used and successful. However, a recent study of gluon fragmentation into a quarkonium at two-loop level,shows that the factorization is broken. It is suggested that the color-octet NRQCD matrix elements should be modified by adding a gauge link to restore the factorization. The modified matrix elements may have extra soft-divergences at one-loop level which the unmodified cannot have, and this can lead to a violation of the universality of these matrix elements. In this letter, we examine in detail the NRQCD factorization for inclusive quarkonium production in e+e(-) annihilation at one-loop level. Our results show that the factorization can be made without the modification of NRQCD matrix elements and it can also be made for relativistic corrections. It turns out that the suggested gauge link will not lead to nonzero contributions to color-octet NRQCD matrix elements at one-loop level and at any order of v. Therefore the universality holds at least at one-loop level. (c) 2005 Elsevier B.V. All rights reserved. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000232169300011 |
| 公开日期 | 2012-08-29 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/13736]  |
| 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 | Ma, JP , Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Si, ZG,Ma, JP,Ma, JP , Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China.. NRQCD factorization and universality of NRQCD matrix elements[J]. PHYSICS LETTERS B,2005,625(40910):67-75. |
| APA | Si, ZG,Ma, JP,&Ma, JP , Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China..(2005).NRQCD factorization and universality of NRQCD matrix elements.PHYSICS LETTERS B,625(40910),67-75. |
| MLA | Si, ZG,et al."NRQCD factorization and universality of NRQCD matrix elements".PHYSICS LETTERS B 625.40910(2005):67-75. |
入库方式： OAI收割
来源：理论物理研究所
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