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Jeffrey S. Hangst

Description and first application of a new technique to measure the gravitational mass of antihydrogen

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

  • C. Amole, York University
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  • M.D. Ashkezari, Simon Fraser University
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  • M. Baquero-Ruiz, University of California at Berkeley
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  • W. Bertsche, Swansea University
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  • E. Butler, CERN
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  • A. Capra, York University
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  • C.L. Cesar, Universidade Federal do Rio de Janeiro
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  • M. Charlton, Swansea University
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  • S. Eriksson, Swansea University
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  • J. Fajans, University of California at Berkeley
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  • T. Friesen, University of Calgary
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  • M.. C. Fujiwara, 4004 Wesbrook Mall
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  • D.R. Gill, 4004 Wesbrook Mall
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  • A. Gutierrez, University of British Columbia
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  • J.S. Hangst
  • W.N. Hardy, University of British Columbia
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  • M.E. Hayden, Simon Fraser University
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  • C.A. Isaac, Swansea University
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  • S. Jonsell, Stockholm University
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  • L. Kurchaninov, 4004 Wesbrook Mall
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  • A. Little, University of California at Berkeley
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  • N. Madsen, Swansea University
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  • J.T.K. McKenna, University of Liverpool
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  • S. Menary, York University
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  • S.C. Napoli, Swansea University
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  • P. Nolan, University of Liverpool
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  • A. Olin, 4004 Wesbrook Mall
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  • P. Pusa, University of Liverpool
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  • Chris Ørum Rasmussen, Danmark
  • F. Robicheaux, Auburn University
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  • E. Sarid, NRCN-Nuclear Research Center Negev
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  • D.M. Silveira, Universidade Federal do Rio de Janeiro
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  • C. So, University of California at Berkeley
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  • R.I. Thompson, University of Calgary
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  • D.P. Van Der Werf, Swansea University
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  • J.S. Wurtele, University of California at Berkeley
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  • A.I. Zhmoginov, University of California at Berkeley
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  • A.E. Charman, University of California at Berkeley
Physicists have long wondered whether the gravitational interactions between matter and antimatter might be different from those between matter and itself. Although there are many indirect indications that no such differences exist and that the weak equivalence principle holds, there have been no direct, free-fall style, experimental tests of gravity on antimatter. Here we describe a novel direct test methodology; we search for a propensity for antihydrogen atoms to fall downward when released from the ALPHA antihydrogen trap. In the absence of systematic errors, we can reject ratios of the gravitational to inertial mass of antihydrogen >75 at a statistical significance level of 5%; worst-case systematic errors increase the minimum rejection ratio to 110. A similar search places somewhat tighter bounds on a negative gravitational mass, that is, on antigravity. This methodology, coupled with ongoing experimental improvements, should allow us to bound the ratio within the more interesting near equivalence regime.
OriginalsprogEngelsk
Artikelnummer1785
TidsskriftNature Communications
Vol/bind4
ISSN2041-1723
DOI
StatusUdgivet - 2013

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