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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
Source PublicationEUROPEAN PHYSICAL JOURNAL C
KeywordQcd Factorization Particle Physics Spectrum Lattice
AbstractWe 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
Volume55Issue:3Pages:417-421
Subject AreaPhysics
Indexed BySCI
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5525
CollectionSCI期刊论文
Corresponding AuthorChao, KT , Peking Univ, Dept Phys, Beijing 100871, Peoples R China
Recommended Citation
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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