Abstract
We present a new derivation of the proton-electron mass ratio from the hydrogen molecular ion, HD+. The derivation entails the adjustment of the mass ratio in highly precise theory so as to reproduce accurately measured ro-vibrational frequencies. This work is motivated by recent improvements of the theory, as well as the more accurate value of the electron mass in the recently published CODATA-14 set of fundamental constants, which justifies using it as input data in the adjustment, rather than the proton mass value as done in previous works. This leads to significantly different sensitivity coefficients and, consequently, a different value and larger uncertainty margin of the proton-electron mass ratio as obtained from HD+.
| Original language | English |
|---|---|
| Article number | 024003 |
| Journal | Journal of Physics B: Atomic, Molecular and Optical Physics |
| Volume | 51 |
| Issue number | 2 |
| Early online date | 27 Dec 2017 |
| DOIs | |
| Publication status | Published - 28 Jan 2018 |
Funding
This work received support from the French–Dutch bilateral EP Nuffic–Van Gogh program. The work of SP, MG and JCJK was financed by Netherlands Organization for Scientific Research (NWO) through projects 13PR3109, Vidi 12346 and FOM-program ‘The Mysterious Size of the Proton’. J-PhK and LH acknowledge funding from Agence Nationale de la Recherche (grant ANR-13-IS04-0002-01). J-PhK acknowledges support from a Fellowship of the Institut Universitaire de France. VIK acknowledges support from the Russian Foundation for Basic Research under Grant No. 15-02-01906-a.
| Funders | Funder number |
|---|---|
| FOM-program | |
| Netherlands Organization for Scientific Research | |
| Agence Nationale de la Recherche | ANR-13-IS04-0002-01 |
| Russian Foundation for Basic Research | 15-02-01906-a |
| Nederlandse Organisatie voor Wetenschappelijk Onderzoek | 13PR3109, 12346 |
| Institut universitaire de France | |
| Nuffic |
Keywords
- fundamental constants
- hydrogen molecular ion
- molecular spectroscopy
