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Revisiting spin alignment of heavy meson in its inclusive production
Ma, JP; Ma, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
2002
发表期刊NUCLEAR PHYSICS B
ISSN0550-3213
卷号622期号:40910页码:416-428
摘要In the heavy quark limit inclusive production rate of a heavy meson can be factorized, in which the nonperturbative effect related to the heavy meson can be characterized by matrix elements defined in the heavy quark effective theory. Using this factorization, predictions for the full spin density matrix of a spin-1 and spin-2 meson can be obtained and they are characterized only by one coefficient representing the nonperturbative effect. Predictions for spin-1 heavy meson are compared with experiment performed at a(+)e(-) colliders in the energy range from roots = 10.5 GeV to roots = 91 GeV, a complete agreement is found for D* and B* meson. For D** meson, our prediction suffers a large correction, as indicated by experimental data. There exists another approach by taking heavy mesons as bound systems, in which the total angular momentum of the light degrees of freedom is 1/2 and 3/2 for spin-1 and spin-2 meson, respectively, then the diagonal parts of spin density matrices can be obtained. However, there are distinct differences in the predictions from the two approaches and they are discussed in detail. (C) 2002 Elsevier Science B.V. All rights reserved.
部门归属Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Charm-quark Fragmentation Effective Field-theory Parton Fragmentation D-star Polarization Decay Matrix Odd
学科领域Physics
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收录类别SCI
WOS记录号WOS:000173640800019
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被引频次:3[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/311006/13601
专题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,Ma, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.. Revisiting spin alignment of heavy meson in its inclusive production[J]. NUCLEAR PHYSICS B,2002,622(40910):416-428.
APA Ma, JP,&Ma, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China..(2002).Revisiting spin alignment of heavy meson in its inclusive production.NUCLEAR PHYSICS B,622(40910),416-428.
MLA Ma, JP,et al."Revisiting spin alignment of heavy meson in its inclusive production".NUCLEAR PHYSICS B 622.40910(2002):416-428.
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