Factorization approach for inclusive production of doubly heavy baryon

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	Factorization approach for inclusive production of doubly heavy baryon
	Ma, JP; Si, ZG; Ma, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
刊名	PHYSICS LETTERS B
	2003
卷号	568 期号:40910 页码:135-145
关键词	Effective Field-theory Quark Fragmentation Gluon Fragmentation P-3(j) Quarkonium Mesons Qcd
ISSN号	0370-2693
英文摘要	We study inclusive production of doubly heavy baryon at a e(+)e(-) collider and at hadron colliders through fragmentation. We study the production by factorizing nonpertubative and perturbative effects. In our approach the production can be thought as a two-step process: a pair of heavy quarks can be produced perturbatively and then the pair is transformed into the baryon. The transformation is nonperturbative. Since a heavy quark moves with a small velocity in the baryon in its rest frame, we can use NRQCD to describe the transformation and perform a systematic expansion in the small velocity. At the leading order we find that the baryon can be formed from two states of the heavy-quark pair, one state is with the pair in S-3(1) state and in color 3, another is with the pair in S-1(0) state and in color 6. Two matrix elements are defined for the transformation from the two states, their perturbative coefficients in the contribution to the cross section at a e+e- collider and to the function of heavy quark fragmentation are calculated. Our approach is different than previous approaches where only the pair in S-3(1) state and in color is taken into account. Numerical results for e(+)e(-) colliders at the two B-factories and for hadronic colliders LHC and Tevatron are given. (C) 2003 Published by Elsevier B.V.
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000184890800017
公开日期	2012-08-29
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/13238]
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, POB 2735, Beijing 100080, Peoples R China.
推荐引用方式 GB/T 7714	Ma, JP,Si, ZG,Ma, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.. Factorization approach for inclusive production of doubly heavy baryon[J]. PHYSICS LETTERS B,2003,568(40910):135-145.
APA	Ma, JP,Si, ZG,&Ma, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China..(2003).Factorization approach for inclusive production of doubly heavy baryon.PHYSICS LETTERS B,568(40910),135-145.
MLA	Ma, JP,et al."Factorization approach for inclusive production of doubly heavy baryon".PHYSICS LETTERS B 568.40910(2003):135-145.