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题名: Revisiting spin alignment of heavy meson in its inclusive production
作者: Ma, JP
刊名: NUCLEAR PHYSICS B
出版日期: 2002
卷号: 622, 期号:40910, 页码:416-428
关键词: CHARM-QUARK FRAGMENTATION ;  EFFECTIVE FIELD-THEORY ;  PARTON FRAGMENTATION ;  D-STAR ;  POLARIZATION ;  DECAY ;  MATRIX ;  ODD
学科分类: Physics
通讯作者: Ma, JP , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
部门归属: Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: 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.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000173640800019
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内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13601
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Ma, JP. Revisiting spin alignment of heavy meson in its inclusive production[J]. NUCLEAR PHYSICS B,2002,622(40910):416-428.
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