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题名: A QCD-analysis for radiative decays of Epsilon into f(2)(1270)
作者: Ma, JP
刊名: NUCLEAR PHYSICS B
出版日期: 2001
卷号: 605, 期号:40911, 页码:625-643
关键词: FACTORIZATION ;  MESONS
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: We perform a QCD analysis for the radiative decay of a heavy S-3(1) quarkonium into the tensor meson f(2)(1270). We make an attempt to separate the nonperturbative effect related to the quarkonium and that related to the tensor meson. the former is represented by NRQCD matrix elements, while the later is parameterized by distribution amplitudes of gluons in the tensor meson at twist-2 level and at twist-3 level. We find that at twist-2 level the helicity. of the tensor meson can be 0 and 2 and the amplitude with lambda = 2 is suppressed. At twist-3 level the tensor meson can have lambda = 1. A comparison with experiment is made, an agreement of our results with experiment can be found. We also briefly discuss the radiative decay into eta and obtain a prediction for Y --> gamma + eta. (C) 2001 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:000170100600025
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/12709
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. A QCD-analysis for radiative decays of Epsilon into f(2)(1270)[J]. NUCLEAR PHYSICS B,2001,605(40911):625-643.
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