Imperial College London
Alternate

Professor Hinds

Faculty of Natural Sciences, Department of Physics

Chair in Physics
 
 
 
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Contact

 

+44 (0)20 7594 7901ed.hinds Website

 
 
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Assistant

 

Miss Sanja Maricic +44 (0)20 7594 7742

 
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Location

 

213Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Truppe:2013:10.1038/ncomms3600,
author = {Truppe, S and Hendricks, RJ and Tokunaga, SK and Lewandowski, HJ and Kozlov, MG and Henkel, C and Hinds, EA and Tarbutt, MR},
doi = {10.1038/ncomms3600},
journal = {Nature Communications},
title = {A search for varying fundamental constants using hertz-level frequency measurements of cold CH molecules},
url = {http://dx.doi.org/10.1038/ncomms3600},
volume = {4},
year = {2013}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Many modern theories predict that the fundamental constants depend on time, position or the local density of matter. Here we develop a spectroscopic method for pulsed beams of cold molecules, and use it to measure the frequencies of microwave transitions in CH with accuracy down to 3 Hz. By comparing these frequencies with those measured from sources of CH in the Milky Way, we test the hypothesis that fundamental constants may differ between the high- and low-density environments of the Earth and the interstellar medium. For the fine structure constant we find Δα/α=(0.3±1.1) × 10−7, the strongest limit to date on such a variation of α. For the electron-to-proton mass ratio we find Δμ/μ=(−0.7±2.2) × 10−7. We suggest how dedicated astrophysical measurements can improve these constraints further and can also constrain temporal variation of the constants.
AU  - Truppe,S
AU  - Hendricks,RJ
AU  - Tokunaga,SK
AU  - Lewandowski,HJ
AU  - Kozlov,MG
AU  - Henkel,C
AU  - Hinds,EA
AU  - Tarbutt,MR
DO  - 10.1038/ncomms3600
PY  - 2013///
SN  - 2041-1723
TI  - A search for varying fundamental constants using hertz-level frequency measurements of cold CH molecules
T2  - Nature Communications
UR  - http://dx.doi.org/10.1038/ncomms3600
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000326471300004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/31953
VL  - 4
ER  -
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