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Constraints on extra dimensions from precision molecular spectroscopy

AuthorsSalumbides, E.J.; Schellekens, A. N. ; Gato Rivera, Beatriz ; Ubachs, W.
KeywordsMolecular spectroscopy
QED in molecules
Higher-dimensional gravity
Issue Date6-Mar-2015
PublisherInstitute of Physics Publishing
CitationNew Journal of Physics 17: 033015 (2015)
AbstractAccurate investigations of quantum-level energies in molecular systems are shown to provide a testing ground to constrain the size of compactified extra dimensions. This is made possible by recent progress in precision metrology with ultrastable lasers on energy levels in neutral molecular hydrogen (H2, HD, and D2) and molecular hydrogen ions (H2+, HD+, and D2+). Comparisons between experiment and quantum electrodynamics calculations for these molecular systems can be interpreted in terms of probing large extra dimensions, under which conditions gravity will become much stronger. Molecules are a probe of spacetime geometry at typical distances where chemical bonds are effective (i.e., at length scales of an Å). Constraints on compactification radii for extra dimensions are derived within the Arkani-Hamed-Dimopoulos-Dvali framework, while constraints for curvature or brane separation are derived within the Randall-Sundrum framework. Based on the molecular spectroscopy of D2 molecules and HD+ ions, the compactification size for seven extra dimensions (in connection to M-theory defined in 11 dimensions) of equal size is shown to be limited to R7 < 0.6 mμ . While limits on compactification sizes of extra dimensions based on other branches of physics are compared, the prospect of further tightening constraints from the molecular method is discussed. © 2015 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft
Description9 págs.; 2 figs.; 2 tabs.; Open Access funded by Creative Commons Atribution Licence 3.0
Publisher version (URL)http://dx.doi.org/10.1088/1367-2630/17/3/033015
Identifiersdoi: 10.1088/1367-2630/17/3/033015
issn: 1367-2630
Appears in Collections:(CFMAC-IFF) Artículos
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