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An experimental limit on the charge 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, K. Olchanski, A. Olin, A. Povilus, P. Pusa, C.Ø. Rasmussen, F. Robicheaux, E. Sarid, D. M. Silveira, C. So, T. D. Tharp, R. I. Thompson, D. P. van der Werf, Z. Vendeiro, J. S. Wurtele, A. I. Zhmoginov, A. E. Charman, Michael Charlton, Dirk van der Werf, Niels Madsen, Aled Isaac, Stefan Eriksson

Nature Communications, Volume: 5, Start page: 3955

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

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DOI (Published version): 10.1038/ncomms4955

Abstract

The properties of antihydrogen are expected to be identical to those of hydrogen, and any differences would constitute a profound challenge to the fundamental theories of physics. The most commonly discussed antiatom-based tests of these theories are searches for antihydrogen-hydrogen spectral diffe...

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Published in: Nature Communications
ISSN: 2041-1723
Published: 2014
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The most commonly discussed antiatom-based tests of these theories are searches for antihydrogen-hydrogen spectral differences (tests of CPT (charge-parity-time) invariance) or gravitational differences (tests of the weak equivalence principle). Here we, the ALPHA Collaboration, report a different and somewhat unusual test of CPT and of quantum anomaly cancellation. A retrospective analysis of the influence of electric fields on antihydrogen atoms released from the ALPHA trap finds a mean axial deflection of 4.1&#xB1;3.4&#x2009;mm for an average axial electric field of 0.51&#x2009;V&#x2009;mm&#x2212;1. Combined with extensive numerical modelling, this measurement leads to a bound on the charge Qe of antihydrogen of Q=(&#x2212;1.3&#xB1;1.1&#xB1;0.4) &#xD7; 10^&#x2212;8. Here, e is the unit charge, and the errors are from statistics and systematic effects.</abstract><type>Journal Article</type><journal>Nature Communications</journal><volume>5</volume><paginationStart>3955</paginationStart><publisher/><issnElectronic>2041-1723</issnElectronic><keywords>Antihydrogen, ALPHA</keywords><publishedDay>3</publishedDay><publishedMonth>6</publishedMonth><publishedYear>2014</publishedYear><publishedDate>2014-06-03</publishedDate><doi>10.1038/ncomms4955</doi><url>http://www.nature.com/ncomms/2014/140603/ncomms4955/full/ncomms4955.html</url><notes/><college>COLLEGE NANME</college><department>College of Science Central Office</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>COSCO</DepartmentCode><institution>Swansea University</institution><apcterm/><lastEdited>2019-08-08T10:34:10.0683260</lastEdited><Created>2014-06-03T16:02:44.1294168</Created><path><level id="1">College of Science</level><level id="2">Physics</level></path><authors><author><firstname>C.</firstname><surname>Amole</surname><order>1</order></author><author><firstname>M. 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spelling 2019-08-08T10:34:10.0683260 v2 18032 2014-06-03 An experimental limit on the charge of antihydrogen d9099cdd0f182eb9a1c8fc36ed94f53f Michael Charlton Michael Charlton true false 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 2014-06-03 COSCO The properties of antihydrogen are expected to be identical to those of hydrogen, and any differences would constitute a profound challenge to the fundamental theories of physics. The most commonly discussed antiatom-based tests of these theories are searches for antihydrogen-hydrogen spectral differences (tests of CPT (charge-parity-time) invariance) or gravitational differences (tests of the weak equivalence principle). Here we, the ALPHA Collaboration, report a different and somewhat unusual test of CPT and of quantum anomaly cancellation. A retrospective analysis of the influence of electric fields on antihydrogen atoms released from the ALPHA trap finds a mean axial deflection of 4.1±3.4 mm for an average axial electric field of 0.51 V mm−1. Combined with extensive numerical modelling, this measurement leads to a bound on the charge Qe of antihydrogen of Q=(−1.3±1.1±0.4) × 10^−8. Here, e is the unit charge, and the errors are from statistics and systematic effects. Journal Article Nature Communications 5 3955 2041-1723 Antihydrogen, ALPHA 3 6 2014 2014-06-03 10.1038/ncomms4955 http://www.nature.com/ncomms/2014/140603/ncomms4955/full/ncomms4955.html COLLEGE NANME College of Science Central Office COLLEGE CODE COSCO Swansea University 2019-08-08T10:34:10.0683260 2014-06-03T16:02:44.1294168 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 K. Olchanski 27 A. Olin 28 A. Povilus 29 P. Pusa 30 C.Ø. Rasmussen 31 F. Robicheaux 32 E. Sarid 33 D. M. Silveira 34 C. So 35 T. D. Tharp 36 R. I. Thompson 37 D. P. van der Werf 38 Z. Vendeiro 39 J. S. Wurtele 40 A. I. Zhmoginov 41 A. E. Charman 42 Michael Charlton 43 Dirk van der Werf 0000-0001-5436-5214 44 Niels Madsen 0000-0002-7372-0784 45 Aled Isaac 0000-0002-7813-1903 46 Stefan Eriksson 47 0018032-17052016095731.pdf ncomms4955Madsen.pdf 2016-05-17T09:57:31.5770000 Output 813964 application/pdf Version of Record true 2016-05-17T09:57:31.0000000 This work is licensed under a Creative Commons AttributionNonCommercial-NoDerivs 3.0 Unported License. true
title An experimental limit on the charge of antihydrogen
spellingShingle An experimental limit on the charge of antihydrogen
Michael, Charlton
Dirk, van der Werf
Niels, Madsen
Aled, Isaac
Stefan, Eriksson
title_short An experimental limit on the charge of antihydrogen
title_full An experimental limit on the charge of antihydrogen
title_fullStr An experimental limit on the charge of antihydrogen
title_full_unstemmed An experimental limit on the charge of antihydrogen
title_sort An experimental limit on the charge of antihydrogen
author_id_str_mv d9099cdd0f182eb9a1c8fc36ed94f53f
4a4149ebce588e432f310f4ab44dd82a
e348e4d768ee19c1d0c68ce3a66d6303
06d7ed42719ef7bb697cf780c63e26f0
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author_id_fullname_str_mv d9099cdd0f182eb9a1c8fc36ed94f53f_***_Michael, Charlton
4a4149ebce588e432f310f4ab44dd82a_***_Dirk, van der Werf
e348e4d768ee19c1d0c68ce3a66d6303_***_Niels, Madsen
06d7ed42719ef7bb697cf780c63e26f0_***_Aled, Isaac
785cbd474febb1bfa9c0e14abaf9c4a8_***_Stefan, Eriksson
author Michael, Charlton
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
K. Olchanski
A. Olin
A. Povilus
P. Pusa
C.Ø. Rasmussen
F. Robicheaux
E. Sarid
D. M. Silveira
C. So
T. D. Tharp
R. I. Thompson
D. P. van der Werf
Z. Vendeiro
J. S. Wurtele
A. I. Zhmoginov
A. E. Charman
Michael Charlton
Dirk van der Werf
Niels Madsen
Aled Isaac
Stefan Eriksson
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url http://www.nature.com/ncomms/2014/140603/ncomms4955/full/ncomms4955.html
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description The properties of antihydrogen are expected to be identical to those of hydrogen, and any differences would constitute a profound challenge to the fundamental theories of physics. The most commonly discussed antiatom-based tests of these theories are searches for antihydrogen-hydrogen spectral differences (tests of CPT (charge-parity-time) invariance) or gravitational differences (tests of the weak equivalence principle). Here we, the ALPHA Collaboration, report a different and somewhat unusual test of CPT and of quantum anomaly cancellation. A retrospective analysis of the influence of electric fields on antihydrogen atoms released from the ALPHA trap finds a mean axial deflection of 4.1±3.4 mm for an average axial electric field of 0.51 V mm−1. Combined with extensive numerical modelling, this measurement leads to a bound on the charge Qe of antihydrogen of Q=(−1.3±1.1±0.4) × 10^−8. Here, e is the unit charge, and the errors are from statistics and systematic effects.
published_date 2014-06-03T03:31:07Z
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