Nuclear structure corrections to the Lamb shift in and

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• 作者：N. Nevo Dinur^a ; ^{nir.nevo@mail.huji.ac.il" class="auth_mail" title="E-mail the corresponding author} ; C. Ji^b ; ^c ; ^d ; ^{ji@ectstar.eu" class="auth_mail" title="E-mail the corresponding author} ; S. Bacca^b ; ^e ; ^{bacca@triumf.ca" class="auth_mail" title="E-mail the corresponding author} ; N. Barnea^a ; ^{nir@phys.huji.ac.il" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Charge radius ; Muonic atom ; Nuclear polarizability ; Two-photon exchange
• 刊名：Physics Letters B
• 出版年：2016
• 出版时间：10 April 2016
• 年：2016
• 卷：755
• 期：Complete
• 页码：380-386
• 全文大小：446 K

文摘

Measuring the 2S–2P Lamb shift in a hydrogen-like muonic atom allows one to extract its nuclear charge radius with a high precision that is limited by the uncertainty in the nuclear structure corrections. The charge radius of the proton thus extracted was found to be 7σ away from the CODATA value, in what has become the yet unsolved “proton radius puzzle”. Further experiments currently aim at the isotopes of hydrogen and helium: the precise extraction of their radii may provide a hint at the solution of the puzzle. We present the first ab initio   calculation of nuclear structure corrections, including the nuclear polarization correction, to the 2S–2P transition in $\mu {}^3\mathrm{He}^{+}$ and $\mu {}^3\mathrm{H}$, and assess solid theoretical error bars. Our predictions reduce the uncertainty in the nuclear structure corrections to the level of a few percent and will be instrumental to the on-going $\mu {}^3\mathrm{He}^{+}$ experiment. We also support the mirror $\mu {}^3\mathrm{H}$ system as a candidate for further probing of the nucleon polarizabilities and shedding more light on the puzzle.