Observation of the effect of gravity on the motion of antimatter

被引：29

作者：

Anderson, E. K. ^{[1
]}

Baker, C. J. ^{[2
]}

Bertsche, W. ^{[3
,4
]}

Bhatt, N. M. ^{[2
]}

Bonomi, G. ^{[5
,6
]}

Capra, A. ^{[7
]}

Carli, I. ^{[7
]}

Cesar, C. L. ^{[8
]}

Charlton, M. ^{[2
]}

Christensen, A. ^{[9
]}

Collister, R. ^{[7
,10
]}

Mathad, A. Cridland ^{[2
]}

Quiceno, D. Duque ^{[7
,10
]}

Eriksson, S. ^{[2
]}

Evans, A. ^{[7
,10
]}

Evetts, N. ^{[10
]}

Fabbri, S. ^{[3
,11
]}

Fajans, J. ^{[9
]}

Ferwerda, A. ^{[12
]}

Friesen, T. ^{[13
]}

Fujiwara, M. C. ^{[7
]}

Gill, D. R. ^{[7
]}

Golino, L. M. ^{[2
]}

Goncalves, M. B. Gomes ^{[2
]}

Grandemange, P. ^{[7
]}

Granum, P. ^{[1
]}

Hangst, J. S. ^{[1
]}

Hayden, M. E. ^{[14
]}

Hodgkinson, D. ^{[3
,9
]}

Hunter, E. D. ^{[9
]}

Isaac, C. A. ^{[2
]}

Jimenez, A. J. U. ^{[7
]}

Johnson, M. A. ^{[3
,4
]}

Jones, J. M. ^{[2
]}

Jones, S. A. ^{[15
]}

Jonsell, S. ^{[16
]}

Khramov, A. ^{[7
,10
,17
]}

Madsen, N. ^{[2
]}

Martin, L. ^{[7
]}

Massacret, N. ^{[7
]}

Maxwell, D. ^{[2
]}

McKenna, J. T. K. ^{[1
,3
]}

Menary, S. ^{[12
]}

Momose, T. ^{[7
,10
,18
]}

Mostamand, M. ^{[7
,18
]}

Mullan, P. S. ^{[2
,19
]}

Nauta, J. ^{[2
]}

Olchanski, K. ^{[7
]}

Oliveira, A. N. ^{[1
]}

Peszka, J. ^{[2
,19
]}

机构：

[1] Aarhus Univ, Dept Phys & Astron, Aarhus, Denmark

[2] Swansea Univ, Dept Phys, Fac Sci & Engn, Swansea, W Glam, Wales

[3] Univ Manchester, Sch Phys & Astron, Manchester, Lancs, England

[4] Cockcroft Inst, Sci Tech Daresbury, Warrington, Cheshire, England

[5] Univ Brescia, Brescia, Italy

[6] INFN Pavia, Brescia, Italy

[7] TRIUMF, Vancouver, BC, Canada

[8] Univ Fed Rio de Janeiro, Inst Fis, Rio De Janeiro, Brazil

[9] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[10] Univ British Columbia, Dept Phys & Astron, Vancouver, BC, Canada

[11] CERN, Accelerator & Technol Sect, Geneva, Switzerland

[12] York Univ, Dept Phys & Astron, Toronto, ON, Canada

[13] Univ Calgary, Dept Phys & Astron, Calgary, AB, Canada

[14] Simon Fraser Univ, Dept Phys, Burnaby, BC, Canada

[15] Univ Groningen, Van Swinderen Inst Particle Phys & Grav, Groningen, Netherlands

[16] Stockholm Univ, Dept Phys, Stockholm, Sweden

[17] British Columbia Inst Technol, Dept Phys, Burnaby, BC, Canada

[18] Univ British Columbia, Dept Chem, Vancouver, BC, Canada

[19] ETH, Inst Particle Phys & Astrophys, Zurich, Switzerland

[20] CERN, Expt Phys Dept, Geneva, Switzerland

[21] Purdue Univ, Dept Phys & Astron, W Lafayette, IN USA

[22] CERN, Accelerator Syst Dept, Geneva, Switzerland

[23] Soreq NRC, Yavne, Israel

[24] Ben Gurion Univ Negev, Phys Dept Phys, Beer Sheva, Israel

[25] INFN Pisa, Pisa, Italy

[26] Univ Sussex, Sch Math & Phys Sci, Brighton, E Sussex, England

[27] Marquette Univ, Dept Phys, Milwaukee, WI USA

来源：

NATURE | 2023年 / 621卷 / 7980期

基金：

英国工程与自然科学研究理事会; 英国科学技术设施理事会; 美国国家科学基金会; 加拿大创新基金会; 以色列科学基金会;

关键词：

ANTIHYDROGEN; POSITRONS; CHARGE;

D O I：

10.1038/s41586-023-06527-1

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Einstein's general theory of relativity from 1915(1) remains the most successful description of gravitation. From the 1919 solar eclipse(2) to the observation of gravitational waves(3), the theory has passed many crucial experimental tests. However, the evolving concepts of dark matter and dark energy illustrate that there is much to be learned about the gravitating content of the universe. Singularities in the general theory of relativity and the lack of a quantum theory of gravity suggest that our picture is incomplete. It is thus prudent to explore gravity in exotic physical systems. Antimatter was unknown to Einstein in 1915. Dirac's theory(4) appeared in 1928; the positron was observed(5) in 1932. There has since been much speculation about gravity and antimatter. The theoretical consensus is that any laboratory mass must be attracted(6) by the Earth, although some authors have considered the cosmological consequences if antimatter should be repelled by matter(7-10). In the general theory of relativity, the weak equivalence principle (WEP) requires that all masses react identically to gravity, independent of their internal structure. Here we show that antihydrogen atoms, released from magnetic confinement in the ALPHA-g apparatus, behave in a way consistent with gravitational attraction to the Earth. Repulsive 'antigravity' is ruled out in this case. This experiment paves the way for precision studies of the magnitude of the gravitational acceleration between anti-atoms and the Earth to test the WEP.

引用

页码：716 / +

页数：23

共 59 条

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