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arXiv 2009.08347nucl-thphysics.atom-ph
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μ子氘原子核极化率的无介子有效场论计算

Pionless Effective Field Theory Evaluation of Nuclear Polarizability in Muonic Deuterium

Samuel B. Emmons, Chen Ji, Lucas Platter

摘要:

在无介子有效场论的框架下,我们计算了氘核从次-次-首阶到次-次-首阶的纵向结构函数。我们利用这些结果计算了μ介子氘的双光子极化率对兰姆位移的贡献,并利用该贡献提取了氘的核电荷半径。我们逐阶给出了相关跃迁矩阵元素和纵向结构函数的解析表达式,并给出了相应对兰姆位移贡献的数值结果。我们还讨论了相对论和其他高阶效应的影响。我们发现协议与以前的计算和解释我们的计算的准确性。

英文摘要:

We calculate the longitudinal structure function of the deuteron up through next-to-next-to-leading order in the framework of pionless effective field theory. We use these results to compute the two-photon polarizability contribution to Lamb shift in muonic deuterium, which can be utilized to extract the nuclear charge radius of the deuteron. We present analytical expressions order-by-order for the relevant transition matrix elements and the longitudinal structure function, and we give numerical results for the corresponding contributions to the Lamb shift. We also discuss the impact of relativistic and other higher-order effects. We find agreement with previous calculations and explain the accuracy of our calculation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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