Proton-electron mass ratio from laser spectroscopy of HD<sup>+</sup> at the part-per-trillion level

doi:10.1126/science.aba0453

GSTDTAP > 气候变化

DOI	10.1126/science.aba0453
	Proton-electron mass ratio from laser spectroscopy of HD⁺ at the part-per-trillion level
	Sayan Patra; M. Germann; J.-Ph. Karr; M. Haidar; L. Hilico; V. I. Korobov; F. M. J. Cozijn; K. S. E. Eikema; W. Ubachs; J. C. J. Koelemeij
	2020-09-04
发表期刊	Science
出版年	2020
英文摘要	The value of the ratio of the masses of the proton and the electron has a bearing on the values of other physical constants. This ratio is known to a very high precision. Patra et al. improved this precision even further by measuring particular frequencies in the rovibrational spectrum of the hydrogen deuteride molecular ion (HD+) (see the Perspective by Hori). To reach this high precision, the researchers placed the HD+ molecules in an ion trap and surrounded them by beryllium ions. The cold beryllium ions then helped cool the HD+ molecules, making the HD+ spectral lines narrow enough that the proton-electron mass ratio could be extracted by comparison with theoretical predictions. Science , this issue p. [1238][1]; see also p. [1160][2] Recent mass measurements of light atomic nuclei in Penning traps have indicated possible inconsistencies in closely related physical constants such as the proton-electron and deuteron-proton mass ratios. These quantities also influence the predicted vibrational spectrum of the deuterated molecular hydrogen ion (HD+) in its electronic ground state. We used Doppler-free two-photon laser spectroscopy to measure the frequency of the v = 0→9 overtone transition ( v , vibrational quantum number) of this spectrum with an uncertainty of 2.9 parts per trillion. By leveraging high-precision ab initio calculations, we converted our measurement to tight constraints on the proton-electron and deuteron-proton mass ratios, consistent with the most recent Penning trap determinations of these quantities. This results in a precision of 21 parts per trillion for the value of the proton-electron mass ratio. [1]: /lookup/doi/10.1126/science.aba0453 [2]: /lookup/doi/10.1126/science.abb9186
领域	气候变化 ; 资源环境
URL	查看原文
引用统计	被引频次：98[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/293273
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Sayan Patra,M. Germann,J.-Ph. Karr,et al. Proton-electron mass ratio from laser spectroscopy of HD⁺ at the part-per-trillion level[J]. Science,2020.
APA	Sayan Patra.,M. Germann.,J.-Ph. Karr.,M. Haidar.,L. Hilico.,...&J. C. J. Koelemeij.(2020).Proton-electron mass ratio from laser spectroscopy of HD⁺ at the part-per-trillion level.Science.
MLA	Sayan Patra,et al."Proton-electron mass ratio from laser spectroscopy of HD⁺ at the part-per-trillion level".Science (2020).