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题名: Radiative decay of Upsilon into a scalar glueball
作者: He, XG ;  Jin, HY ;  Ma, JP
刊名: PHYSICAL REVIEW D
出版日期: 2002
卷号: 66, 期号:7, 页码:-
关键词: QCD SUM-RULES ;  LATTICES ;  PHYSICS ;  MASS
学科分类: Physics
通讯作者: He, XG , Zhejiang Univ, Inst Modern Phys, Zhejiang, Peoples R China.
部门归属: Zhejiang Univ, Inst Modern Phys, Zhejiang, Peoples R China; Natl Taiwan Univ, Dept Phys, Taipei, Taiwan; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: We study the radiative decay of Y into a scalar glueball Y-->gammaG(s) using QCD factorization. We find that for this process the nonperturbative effects can be factorized into a matrix element well defined in nonrelativistic QCD (NRQCD) and the gluon distribution amplitude. The same NRQCD matrix element appears also in the leptonic decay of Y and therefore can be determined from data. In the asymptotic limit the gluon distribution amplitude is known up to a normalization constant. Using a QCD sum-rule calculation for the normalization constant, we obtain Br(Y-->gammaG(s)) to be in the range (1-2)x10(-3). We also discuss some of the implications for Y-->gammaf(i) decays. Near future data from CLEO-III can provide crucial information about scalar glueball properties.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000179068200027
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13427
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:
He, XG,Jin, HY,Ma, JP. Radiative decay of Upsilon into a scalar glueball[J]. PHYSICAL REVIEW D,2002,66(7):-.
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