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gamma 3 pi and pi 2 gamma form factors from dynamical constituent quarks
Li, XY; Yi, LO; Li, XY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
2001
发表期刊PHYSICS LETTERS B
ISSN0370-2693
卷号505期号:40912页码:119-124
摘要We study the form factors of the low-energy anomalous pi2 gamma and gamma3 pi processes in the nonlocal chiral quark model which incorporates the momentum dependence of the dynamical quark mass and realizes correctly the chiral symmetries. The obtained slope parameter for pi2 gamma is in reasonable agreement with the direct experimental results but smaller than the ones invoking vector meson dominance. Our result for the gamma3 pi form factor interpolates. between the two extremes of theoretical approaches, with the largest one provided by the vector meson dominance and the smallest one by the Schwinger-Dyson approach. But all of them are well below the single data point available so far. This situation will hopefully be clarified by the experiments at CEBAF and CERN. (C) 2001 Elsevier Science B.V. All rights reserved.
部门归属Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Univ Leipzig, Inst Theoret Phys, D-04109 Leipzig, Germany; Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China
关键词Chiral Perturbation-theory Vector-mesons Pion Couplings Anomalies Decays Model Pi-0 Eta Qcd
学科领域Physics
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收录类别SCI
WOS记录号WOS:000168525700018
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/12767
专题理论物理所1978-2010年知识产出
通讯作者Li, XY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
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Li, XY,Yi, LO,Li, XY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.. gamma 3 pi and pi 2 gamma form factors from dynamical constituent quarks[J]. PHYSICS LETTERS B,2001,505(40912):119-124.
APA Li, XY,Yi, LO,&Li, XY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China..(2001).gamma 3 pi and pi 2 gamma form factors from dynamical constituent quarks.PHYSICS LETTERS B,505(40912),119-124.
MLA Li, XY,et al."gamma 3 pi and pi 2 gamma form factors from dynamical constituent quarks".PHYSICS LETTERS B 505.40912(2001):119-124.
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