论文标题
来自HD $^+$激光光谱的质子电子质量比在零件级别
Proton-Electron Mass Ratio from Laser Spectroscopy of HD$^+$ at the Part-Per-Trillion Level
论文作者
论文摘要
自最近测量陷阱的测量结果以来，几个亚原子颗粒的质量值都受到争议，从而产生了更精确但不兼容的结果，这意味着在质子电子和Deuteron-Proton质量比等紧密相关的物理常数中可能存在不一致之处。这些量还影响了其电子接地状态的氘化分子氢离子的预测振动光谱，我们通过其通过无多个双倍的两倍激光光谱法测量了V = 0-9的泛音转变频率，不确定性为2.9个零件。利用高精度的初始计算，我们将测量值转换为对质子 - 电子和deuteron-proton质量比的严格约束，这与这些数量的最新Penning-trap陷阱确定一致，并产生质子 - 电子质量比的新价值，并具有21份21个零件的预定精度。
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.
