Quark-hadron duality in electron-pion scattering

被引：0
|
作者：
W. Melnitchouk
机构：
[1] Jefferson Lab,
[2] 12000 Jefferson Avenue,undefined
[3] Newport News,undefined
[4] VA 23606,undefined
[5] USA,undefined
来源：
The European Physical Journal A - Hadrons and Nuclei | 2003年 / 17卷
关键词：
PACS. 13.60.Hb Total and inclusive cross sections (including deep-inelastic processes) – 12.40.Nn Regge theory, duality, absorptive/optical models – 13.40.Gp Electromagnetic form factors;
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摘要：
We explore the relationship between exclusive and inclusive electromagnetic scattering from the pion, focusing on the transition region at intermediate Q2. Combining Drell-Yan data on the leading twist quark distribution in the pion with a model for the resonance region at large x, we calculate QCD moments of the pion structure function over a range of Q2, and quantify the role of higher twist corrections. Using a parameterization of the pion elastic form factor and phenomenological models for the π↦ρ transition form factor, we further test the extent to which local duality may be valid for the pion.
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页码：223 / 234
页数：11
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