Proton-Electron Mass Ratio from Laser Spectroscopy of HD${}^{+}$ at the Part-Per-Trillion Level

Abstract

Accepted values of the masses of several subatomic particles have been under debate since recent measurements in Penning traps produced more precise yet incompatible results, implying possible inconsistencies in closely related physical constants like the proton-electron and deuteron-proton mass ratios. These quantities also influence the predicted vibrational spectrum of the deuterated molecular hydrogen ion in its electronic ground state, of which we measured the v=0 - 9 overtone transition frequency with an uncertainty of 2.9 parts-per-trillion through Doppler-free two-photon laser spectroscopy. Leveraging high-precision ab initio calculations we convert 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, and yielding a new value of the proton-electron mass ratio with an unprecedented precision of 21 parts-per-trillion.

References in corpus (5)

• The static and dynamic polarisability, and the Stark and black-body radiation frequency shifts of the molecular hydrogen ions H2+, HD+, and D2+
• High-precision mass spectrometer for light ions
• NRQED approach to the fine and hyperfine structure corrections of order $m{\alpha }^6$ and $m{\alpha }^6(m/M)$ -- Application to the hydrogen atom
• High-precision spectroscopy of the HD+ molecule at the 1-p.p.b. level
• Proton-electron mass ratio from HD${}^{+}$ revisited

Cited by in corpus (17)

• Complete ${\alpha }^{7}m$ Lamb shift of helium triplet states
• Quantum control of molecules for fundamental physics
• Trapping, cooling, and photodissociation analysis of state-selected H$\_2^{+}$ ions produced by (3+1) multiphoton ionization
• Ultracold ${}^{88}{\mathrm{Sr}}_2$ molecules in the absolute ground state
• Hyperfine structure in the H${}_2^{+}$ and HD${}^{+}$ molecular ions at $m{\alpha }^6$ order
• Improved Ionization and Dissociation Energies of the Deuterium Molecule
• Higher-order corrections to spin-spin scalar interactions in HD${}^{+}$ and H${}_2^{+}$
• Generation of rotational ground state HD${}^{+}$ ions in an ion trap using a resonance-enhanced threshold photoionization process
• Higher-order corrections to spin-orbit and spin-spin tensor interactions in hydrogen molecular ions: theory and application to H${}_2^{+}$
• Solution of the two-center Dirac equation with 20 digits precision using the finite-element technique
• High-precision solution of the Dirac Equation for the hydrogen molecular ion using a basis-set expansion
• Higher-order corrections to the spin-orbit and spin-spin tensor interactions in HD${}^{+}$
• Crisis and catharsis in atomic physics
• Number-Resolved Detection of Dark Ions in Coulomb Crystals
• Proposal for suppressing ac Stark shift in the He($2{}^3{S}_1\to 3{}^3{S}_1$) two-photon transition using magic wavelengths
• Spin-orbit interaction in the HD${}^{+}$ ion
• Ro-vibrational spin-averaged transitions in the hydrogen molecular ions