Stability of the proton-to-electron mass ratio

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We report a limit on the fractional temporal variation of the proton-to-electron mass ratio as, 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.

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Atomic Physics, Quantum Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/212129

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0803.1829
 http://arxiv.org/abs/0803.1829
 Phys.Rev.Lett.100:150801,2008
 doi:10.1103/PhysRevLett.100.150801

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arXiv