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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.
2003
发表期刊PHYSICS LETTERS B
ISSN0370-2693
卷号568期号:40910页码:135-145
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.
部门归属Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China; Shandong Univ, Dept Phys, Jinan 250100, Peoples R China
关键词Effective Field-theory Quark Fragmentation Gluon Fragmentation P-3(j) Quarkonium Mesons Qcd
学科领域Physics
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收录类别SCI
WOS记录号WOS:000184890800017
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被引频次:40[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13238
专题理论物理所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.
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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.
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