Toward a determination of the proton-electron mass ratio from the Lamb-dip measurement of HD

Abstract

Precision spectroscopy of the hydrogen molecule is a test ground of quantum electrodynamics (QED), and may serve for 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 HD. The line position was determined to be 217 105 182.79 $\pm 0.03_{stat}\pm 0.08_{syst}$ MHz ($\delta \nu /\nu =4\times 10^{-10}$), which is the most accurate transition ever measured for the hydrogen molecule. Moreover, from calculations including QED effects up to the order $m_e{\alpha }^6$, 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-electron mass ratio with a precision of 1.3 parts per billion.

arXiv comment5 pages, 4 figures

References in corpus (14)

• CODATA Recommended Values of the Fundamental Physical Constants: 2014
• Nonadiabatic corrections to rovibrational levels of H${}_2$
• Saturated-absorption cavity ring-down spectroscopy
• Probing QED and fundamental constants through laser spectroscopy of vibrational transitions in HD+
• Bounds on fifth forces from precision measurements on molecules
• Continuous probe of cold complex molecules with infrared frequency comb spectroscopy
• High-precision measurement of the proton's atomic mass
• Fundamental transitions and ionization energies of the hydrogen molecular ions at the few ppt level
• Sub-Doppler frequency metrology in HD for test of fundamental physics
• QED effects in molecules: test on rotational quantum states of H${}_2$
• Complete ${\alpha }^{6}m$ corrections to the ground state of H${}_2$
• Relativistic corrections for the ground electronic state of molecular hydrogen
• Molecular near-infrared transitions determined with sub-kHz accuracy
• Schrödinger equation solved for the hydrogen molecule with unprecedented accuracy

Cited by in corpus (20)

• Sub-Doppler frequency metrology in HD for test of fundamental physics
• Rovibrational energy levels of the hydrogen molecule through nonadiabatic perturbation theory
• Dissociation energy of the hydrogen molecule at 10${}^{-9}$ accuracy
• Lamb-dips and Lamb-peaks in the saturation spectrum of HD
• Nonadiabatic relativistic correction in H${}_2$, D${}_2$, and HD
• Quantum control of molecules for fundamental physics
• Sub-ppb measurement of a fundamental band rovibrational transition in HD
• Ultra-high finesse cavity-enhanced spectroscopy for accurate tests of quantum electrodynamics for molecules
• A Quantum Klystron -- Controlling Quantum Systems with Modulated Electron Beams
• Precision measurement of the fundamental vibrational frequencies of tritium-bearing hydrogen molecules: T${}_2$, DT, HT
• Hyperfine structure in the HD molecule
• Fano-like resonance due to interference with distant transitions
• Hyperfine components of all rovibrational quadrupole transitions in the H${}_2$ and D${}_2$ molecules
• Generation of rotational ground state HD${}^{+}$ ions in an ion trap using a resonance-enhanced threshold photoionization process
• Rotational level spacings in HD from vibrational saturation spectroscopy
• Frequency measurements and self-broadening of sub-Doppler transitions in the $v_1+v_3$ band of C${}_2$H${}_2$
• Nonrelativistic energy of tritium-containing hydrogen molecule isotopologues
• A Stimulated Raman Loss spectrometer for metrological studies of quadrupole lines of hydrogen isotopologues
• Doppler-free high resolution continuous wave optical UV-spectroscopy on the $\mathrm{A}{}^2{\Sigma }^{+}\leftarrow \mathrm{X}{}^2{\Pi }_{3/2}$ transition in nitric oxide
• Lamb-peak spectrum of the HD (2-0) P(1) line