Toward a Determination of the Proton-Electron Mass Ratio from the Lamb-Dip Measurement of HD

Physical Review Letters
L-G TaoS-M Hu

Abstract

Precision spectroscopy of the hydrogen molecule is a test ground of quantum electrodynamics (QED), and it may serve for the determination of fundamental constants. Using a comb-locked cavity ring-down spectrometer, for the first time, we observed the Lamb-dip spectrum of the R(1) line in the overtone of hydrogen deuteride (HD). The line position was determined to be 217 105 182.79±0.03_{stat}±0.08_{syst}  MHz (δν/ν=4×10^{-10}), which is the most accurate rovibrational transition ever measured in the ground electronic state of molecular hydrogen. Moreover, from calculations including QED effects up to the order m_{e}α^{6}, we obtained predictions for this R(1) line as well as for the HD dissociation energy, which are less accurate but signaling the importance of the complete treatment of nonadiabatic effects. Provided that the theoretical calculation reaches the same accuracy, the present measurement will lead to a determination of the proton-to-electron mass ratio with a precision of 1.3 parts per billion.

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Citations

Jan 23, 2020·Physical Chemistry Chemical Physics : PCCP·Hao WuShui-Ming Hu
Apr 16, 2020·Physical Chemistry Chemical Physics : PCCP·K-F LaiE J Salumbides
Oct 22, 2018·The Journal of Chemical Physics·Sylvestre TwagirayezuTrevor J Sears
Jul 24, 2020·Physical Review Letters·Arthur Fast, Samuel A Meek
Jul 22, 2018·Physical Review Letters·C-F ChengCh Jungen
Feb 15, 2020·Scientific Reports·Riccardo GottiMarco Marangoni
Sep 14, 2018·Physical Chemistry Chemical Physics : PCCP·Liming Wang, Zong-Chao Yan
Sep 1, 2018·Physical Review Letters·Mariusz PuchalskiKrzysztof Pachucki
Oct 17, 2018·Physical Chemistry Chemical Physics : PCCP·Krzysztof Pachucki, Jacek Komasa
Oct 1, 2019·Optics Letters·M L DioufW Ubachs
May 15, 2018·Physical Review Letters·F M J CozijnW Ubachs
Aug 4, 2021·The Review of Scientific Instruments·C-L HuS-M Hu

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