Published April 18, 2008
| Version v1
Journal article
Stability of the Proton-to-Electron Mass Ratio
- 1. Laboratoire de Physique des Lasers, UMR CNRS 7538, Institut Galilee, Universite Paris 13, 99, ave J.-B. Clement, 93430 Villetaneuse (France)
Description
We report a limit on the fractional temporal variation of the proton-to-electron mass ratio as (1/(mP/me))(∂/∂t)(mP/me)=(-3.8±5.6)x10-14 yr-1, obtained by comparing the frequency of a rovibrational transition in SF6 with the fundamental hyperfine transition in Cs. The SF6 transition was accessed using a CO2 laser to interrogate spatial 2-photon Ramsey fringes. The atomic transition was accessed using a primary standard controlled with a Cs fountain. This result is direct and model-free
Additional details
Identifiers
- DOI
- 10.1103/PhysRevLett.100.150801;
- arXiv
- arXiv:0803.1829v1;
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 100
- Journal Issue
- 15
- Journal Page Range
- p. 150801-150801.4
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 40006571
- Subject category
- S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; S74: ATOMIC AND MOLECULAR PHYSICS;
- Descriptors DEI
- CARBON DIOXIDE LASERS; ELECTRONS; MASS; PHOTONS; PROTONS; STABILITY; SULFUR FLUORIDES
- Descriptors DEC
- BARYONS; BOSONS; ELEMENTARY PARTICLES; FERMIONS; FLUORIDES; FLUORINE COMPOUNDS; GAS LASERS; HADRONS; HALIDES; HALOGEN COMPOUNDS; LASERS; LEPTONS; MASSLESS PARTICLES; NUCLEONS; SULFUR COMPOUNDS
Optional Information
- Notes
- (c) 2008 The American Physical Society