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关于x近似为1时结构函数的局部对偶性预测

Local Duality Predictions for x approximately 1 Structure Functions.

作者信息

Melnitchouk W

机构信息

Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606 and and Special Research Centre for the Subatomic Structure of Matter, Adelaide University, Adelaide 5005, Australia.

出版信息

Phys Rev Lett. 2001 Jan 1;86(1):35-38. doi: 10.1103/PhysRevLett.86.35.

Abstract

Recent data on the proton F2 structure function in the resonance region suggest that local quark-hadron duality works remarkably well for each of the low-lying resonances, including the elastic, to rather low values of Q2. We derive model-independent relations between structure functions at x approximately 1 and elastic electromagnetic form factors, and predict the x-->1 behavior of nucleon polarization asymmetries and the neutron to proton structure function ratios from available data on nucleon electric and magnetic form factors.

摘要

近期关于共振区质子F2结构函数的数据表明,对于包括弹性散射在内的每个低激发共振态,局部夸克-强子对偶性在相当低的Q2值下都表现得非常好。我们推导了x约为1时结构函数与弹性电磁形状因子之间与模型无关的关系,并根据核子电和磁形状因子的现有数据预测了核子极化不对称性以及中子与质子结构函数比在x→1时的行为。

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