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Limit on the cosmological variation of mp/me from the inversion spectrum of ammonia.
We obtain the limit on the space-time variation of the ratio of the proton mass to the electron mass, mu=m(p)/m(e), based on comparison of quasar absorption spectra of NH3 with CO, HCO+ and HCNExpand
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Methanol as A Tracer of Fundamental Constants
The methanol molecule CH{sub 3}OH has a complex microwave spectrum with a large number of very strong lines. This spectrum includes purely rotational transitions as well as transitions withExpand
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Blackbody-radiation shift in the Sr optical atomic clock
We evaluated the static and dynamic polarizabilities of the $5{s}^{2}\phantom{\rule{0.16em}{0ex}}{}^{1}{S}_{0}$ and $5s5p\phantom{\rule{0.16em}{0ex}}{}^{3}{P}_{0}^{o}$ states of Sr using theExpand
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A new approach for testing variations of fundamental constants over cosmic epochs using FIR fine-structure lines
Aims. We aim to obtain limits on the variation of the fine-structure constant α and the electron-to-proton mass ratio μ over different cosmological epochs. Methods. A new approach based on theExpand
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Searching for chameleon-like scalar fields with the ammonia method , II. Mapping of cold molecular cores in NH3 and HC3N lines
Context. In our previous work we found a statistically significant offset ΔV ≈ 27 m s −1 between the radial velocities of the HC3N J = 2− 1a nd NH 3 (J,K) = (1, 1) transitions observed in molecularExpand
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ELECTRIC-DIPOLE AMPLITUDES, LIFETIMES, AND POLARIZABILITIES OF THE LOW-LYING LEVELS OF ATOMIC YTTERBIUM
Centre for Optics and Atomic Physics, Sussex University, Falmer, Brighton BN1 9QH, United Kingdom~Received 2 March 1999!The results of ab initio calculations of electric-dipole amplitudes, lifetimes,Expand
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Flavor physics of leptons and dipole moments
This chapter of the report of the “Flavor in the era of the LHC” Workshop discusses the theoretical, phenomenological and experimental issues related to flavor phenomena in the charged lepton sectorExpand
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Λ -doublet spectra of diatomic radicals and their dependence on fundamental constants
$\Lambda$-doublet spectra of light diatomic radicals have high sensitivity to the possible variations of the fine structure constant alpha and electron-to-proton mass ratio beta. For molecules OH andExpand
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An upper limit to the variation in the fundamental constants at redshift z = 5.2
Aims. We constrain a hypothetical variation in the fundamental physical constants over the course of cosmic time. Methods. We use unique observations of the CO(7-6) rotational line and the (Ci) 3 P2Expand
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SENSITIVITY OF THE H3O+ INVERSION-ROTATIONAL SPECTRUM TO CHANGES IN THE ELECTRON-TO-PROTON MASS RATIO
Quantum-mechanical tunneling inversion transition in ammonia (NH3) is actively used as a sensitive tool to study possible variations of the electron-to-proton mass ratio, μ = m e/m p. The moleculeExpand
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