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Chao, K. T.; He, Xiao-Gang; Ma, J. P.; Chao, KT , Peking Univ, Dept Phys, Beijing 100871, Peoples R China
On two-body decays of a scalar glueball
发表期刊EUROPEAN PHYSICAL JOURNAL C
关键词Qcd Factorization Particle Physics Spectrum Lattice
摘要We study two-body decays of a scalar glueball. We show that in QCD a spin-0 pure glueball (a state with only gluons) cannot decay into a pair of light quarks if chiral symmetry holds exactly, i.e., the decay amplitude is chirally suppressed. However, this chiral suppression does not materialize itself at the hadron level such as in decays into pi(+)pi(-) and K+K-. We show this explicitly in the two cases with the glueball much lighter and much heavier than the QCD scale using low-energy theorems and perturbative QCD. For a heavy glueball, using QCD factorization based on an effective Lagrangian, we find that the hadronization into pi pi and KK leads to a large difference between Br(pi(+)pi(-)) and Br(K+K-); even the decay amplitude is not chirally suppressed. Our results can provide some understanding of the partonic contents if Br(pi pi) or Br(K (K) over bar) is measured reliably.
2008
ISSN1434-6044
卷号55期号:3页码:417-421
学科领域Physics
收录类别SCI
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被引频次:9[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/311006/5525
专题理论物理所科研产出_SCI论文
通讯作者Chao, KT , Peking Univ, Dept Phys, Beijing 100871, Peoples R China
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GB/T 7714
Chao, K. T.,He, Xiao-Gang,Ma, J. P.,et al. On two-body decays of a scalar glueball[J]. EUROPEAN PHYSICAL JOURNAL C,2008,55(3):417-421.
APA Chao, K. T.,He, Xiao-Gang,Ma, J. P.,&Chao, KT , Peking Univ, Dept Phys, Beijing 100871, Peoples R China.(2008).On two-body decays of a scalar glueball.EUROPEAN PHYSICAL JOURNAL C,55(3),417-421.
MLA Chao, K. T.,et al."On two-body decays of a scalar glueball".EUROPEAN PHYSICAL JOURNAL C 55.3(2008):417-421.
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