Forward virtual Compton scattering and the Lamb shift in chiral perturbation theory
Forward virtual Compton scattering and the Lamb shift in chiral perturbation theory
复制标题
前向虚康普顿散射和手性微扰理论中的兰姆位移
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
A. Pineda
中科院分区：
文献类型：
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作者：
David Nevado;A. Pineda
利用重子手征微扰理论和色散关系，计算了质子单圈前向虚光子康普顿张量的自旋无关结构函数。我们研究这两种方法之间的关系。利用这些结果，我们将一些求和规则推广到虚光子转移动量，并将它们与深度非弹性散射的求和规则联系起来。然后，我们计算的领先手征项的极化率修正的兰姆位移的氢和μ子氢。对氢原子和μ子氢原子的兰姆位移的修正分别为-87.05/n{sup 3}Hz和-0.148/n{sup 3}meV。
We compute the spin-independent structure functions of the forward virtual-photon Compton tensor of the proton at one loop using heavy baryon chiral perturbation theory and dispersion relations. We study the relation between both approaches. We use these results to generalize some sum rules to virtual photon transfer momentum and relate them with sum rules in deep inelastic scattering. We then compute the leading chiral term of the polarizability correction to the Lamb shift of hydrogen and muonic hydrogen. We obtain -87.05/n{sup 3}Hz and -0.148/n{sup 3}meV for the correction to the hydrogen and muonic hydrogen Lamb shift, respectively.