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Description and first application of a new technique to measure the gravitational mass of antihydrogen / C Amole, M. D Ashkezari, M Baquero-Ruiz, W Bertsche, E Butler, A Capra, C. L Cesar, M Charlton, S Eriksson, J Fajans, T Friesen, M. C Fujiwara, D. R Gill, A Gutierrez, J. S Hangst, W. N Hardy, M. E Hayden, C. A Isaac, S Jonsell, L Kurchaninov, A Little, N Madsen, J. T. K McKenna, S Menary, S. C Napoli, P Nolan, A Olin, P Pusa, C. Ø Rasmussen, F Robicheaux, E Sarid, D. M Silveira, C So, R. I Thompson, D. P. van der Werf, J. S Wurtele, A. I Zhmoginov, A. E Charman, Dirk van der Werf, Niels Madsen, Aled Isaac, Stefan Eriksson

Nature Communications, Volume: 4

Swansea University Authors: Dirk van der Werf, Niels Madsen, Aled Isaac, Stefan Eriksson

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DOI (Published version): 10.1038/ncomms2787

Abstract

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 di...

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Published in: Nature Communications
ISSN: 2041-1723
Published: 2013
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URI: https://cronfa.swan.ac.uk/Record/cronfa14766
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spelling 2015-07-13T15:58:44.5861697 v2 14766 2013-05-01 Description and first application of a new technique to measure the gravitational mass of antihydrogen 4a4149ebce588e432f310f4ab44dd82a 0000-0001-5436-5214 Dirk van der Werf Dirk van der Werf true false e348e4d768ee19c1d0c68ce3a66d6303 0000-0002-7372-0784 Niels Madsen Niels Madsen true false 06d7ed42719ef7bb697cf780c63e26f0 0000-0002-7813-1903 Aled Isaac Aled Isaac true false 785cbd474febb1bfa9c0e14abaf9c4a8 Stefan Eriksson Stefan Eriksson true false 2013-05-01 SPH 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. Journal Article Nature Communications 4 2041-1723 30 4 2013 2013-04-30 10.1038/ncomms2787 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2015-07-13T15:58:44.5861697 2013-05-01T09:49:45.0935116 College of Science Physics C Amole 1 M. D Ashkezari 2 M Baquero-Ruiz 3 W Bertsche 4 E Butler 5 A Capra 6 C. L Cesar 7 M Charlton 8 S Eriksson 9 J Fajans 10 T Friesen 11 M. C Fujiwara 12 D. R Gill 13 A Gutierrez 14 J. S Hangst 15 W. N Hardy 16 M. E Hayden 17 C. A Isaac 18 S Jonsell 19 L Kurchaninov 20 A Little 21 N Madsen 22 J. T. K McKenna 23 S Menary 24 S. C Napoli 25 P Nolan 26 A Olin 27 P Pusa 28 C. Ø Rasmussen 29 F Robicheaux 30 E Sarid 31 D. M Silveira 32 C So 33 R. I Thompson 34 D. P. van der Werf 35 J. S Wurtele 36 A. I Zhmoginov 37 A. E Charman 38 Dirk van der Werf 0000-0001-5436-5214 39 Niels Madsen 0000-0002-7372-0784 40 Aled Isaac 0000-0002-7813-1903 41 Stefan Eriksson 42
title Description and first application of a new technique to measure the gravitational mass of antihydrogen
spellingShingle Description and first application of a new technique to measure the gravitational mass of antihydrogen
Dirk, van der Werf
Niels, Madsen
Aled, Isaac
Stefan, Eriksson
title_short Description and first application of a new technique to measure the gravitational mass of antihydrogen
title_full Description and first application of a new technique to measure the gravitational mass of antihydrogen
title_fullStr Description and first application of a new technique to measure the gravitational mass of antihydrogen
title_full_unstemmed Description and first application of a new technique to measure the gravitational mass of antihydrogen
title_sort Description and first application of a new technique to measure the gravitational mass of antihydrogen
author_id_str_mv 4a4149ebce588e432f310f4ab44dd82a
e348e4d768ee19c1d0c68ce3a66d6303
06d7ed42719ef7bb697cf780c63e26f0
785cbd474febb1bfa9c0e14abaf9c4a8
author_id_fullname_str_mv 4a4149ebce588e432f310f4ab44dd82a_***_Dirk, van der Werf
e348e4d768ee19c1d0c68ce3a66d6303_***_Niels, Madsen
06d7ed42719ef7bb697cf780c63e26f0_***_Aled, Isaac
785cbd474febb1bfa9c0e14abaf9c4a8_***_Stefan, Eriksson
author Dirk, van der Werf
Niels, Madsen
Aled, Isaac
Stefan, Eriksson
author2 C Amole
M. D Ashkezari
M Baquero-Ruiz
W Bertsche
E Butler
A Capra
C. L Cesar
M Charlton
S Eriksson
J Fajans
T Friesen
M. C Fujiwara
D. R Gill
A Gutierrez
J. S Hangst
W. N Hardy
M. E Hayden
C. A Isaac
S Jonsell
L Kurchaninov
A Little
N Madsen
J. T. K McKenna
S Menary
S. C Napoli
P Nolan
A Olin
P Pusa
C. Ø Rasmussen
F Robicheaux
E Sarid
D. M Silveira
C So
R. I Thompson
D. P. van der Werf
J. S Wurtele
A. I Zhmoginov
A. E Charman
Dirk van der Werf
Niels Madsen
Aled Isaac
Stefan Eriksson
format Journal article
container_title Nature Communications
container_volume 4
publishDate 2013
institution Swansea University
issn 2041-1723
doi_str_mv 10.1038/ncomms2787
college_str College of Science
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hierarchy_top_id collegeofscience
hierarchy_top_title College of Science
hierarchy_parent_id collegeofscience
hierarchy_parent_title College of Science
department_str Physics{{{_:::_}}}College of Science{{{_:::_}}}Physics
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description 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.
published_date 2013-04-30T03:26:22Z
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