Dokument: High-accuracy laser spectroscopy of H2 + and the proton–electron mass ratio

Titel:	High-accuracy laser spectroscopy of H2 + and the proton–electron mass ratio
URL für Lesezeichen:	https://docserv.uni-duesseldorf.de/servlets/DocumentServlet?id=71428
URN (NBN):	urn:nbn:de:hbz:061-20251119-111351-7
Kollektion:	Publikationen
Sprache:	Englisch
Dokumententyp:	Wissenschaftliche Texte » Artikel, Aufsatz
Medientyp:	Text
Autoren:	Alighanbari, Soroosh [Autor] Schenkel, Magnus [Autor] Schiller, Stephan [Autor] Korobov, Vladimir [Autor]
Dateien:	[Dateien anzeigen] Adobe PDF [Details] 1,45 MB in einer Datei [ZIP-Datei erzeugen] Dateien vom 19.11.2025 / geändert 19.11.2025
Beschreibung:	The molecular hydrogen ions (MHI) are three-body systems suitable for advancing our knowledge in several domains: fundamental constants, tests of quantum physics, search for new interparticle forces, tests of the weak equivalence principle1 and, once the anti-molecule p p e+ becomes available, new tests of charge–parity–time-reversal invariance and local position invariance1–3. To achieve these goals, high-accuracy laser spectroscopy of several isotopologues, in particular H2+, is required4. Here we present a Doppler-free laser spectroscopy of a H2+ rovibrational transition, achieving line resolutions as large as 2.2 × 1013. We accurately determine the transition frequency with 8 × 10−12 fractional uncertainty. We also determine the spinrotation coupling coefficient with 0.1 kHz uncertainty and its value is consistent with the state-of-the-art theory prediction5. The combination of our theoretical and experimental H2+ data allows us to deduce a new value for the proton-electron mass ratio mp/me. It is in agreement with the value obtained from mass spectrometry and has 2.3 times lower uncertainty. From combined MHI, H/D and muonic H/D data, we determine the baryon mass ratio md/mp with 1.1 × 10−10 absolute uncertainty. The value agrees with the directly measured mass ratio6. Finally, we present a match between a theoretical prediction and an experimental result, with a fractional uncertainty of 8.1 × 10−12. Both results indicate a notable confirmation of the predictive power of quantum theory and the absence of beyond-the-standard-model effects at these levels.
Rechtliche Vermerke:	Originalveröffentlichung: Alighanbari, S., Schenkel, M., Korobov, V. I., & Schiller, S. (2025). High-accuracy laser spectroscopy of $${{\bf{H}}}_{{\bf{2}}}^{+}$$ and the proton–electron mass ratio. Nature, 644(8075), 69–75. https://doi.org/10.1038/s41586-025-09306-2
Lizenz:	Dieses Werk ist lizenziert unter einer Creative Commons Namensnennung 4.0 International Lizenz
Fachbereich / Einrichtung:	Mathematisch- Naturwissenschaftliche Fakultät
Dokument erstellt am:	19.11.2025
Dateien geändert am:	19.11.2025