Testing the Weak Equivalence Principle with an antimatter beam at CERN

4th Symposium on Prospects in the Physics of Discrete Symmetries

Kimura, M.^3 ; Aghion, S.^1,2 ; Amsler, C.^3 ; Ariga, A.^3 ; Ariga, T.^3 ; Belov, A.^4 ; Bonomi, G.^5,6 ; Bräunig, P.^7 ; Bremer, J.^8 ; Brusa, R.S.^9,10 ; Cabaret, L.^11 ; Caccia, M.^2,12 ; Caravita, R.^13,14 ; Castelli, F.^2,15 ; Cerchiari, G.^16 ; Chlouba, K.^17 ; Cialdi, S.^2,15 ; Comparat, D.^11 ; Consolati, G.^1,2 ; Demetrio, A.^7 ; Derking, H.^8 ; Noto, L. Di^13,14 ; Doser, M.^8 ; Dudarev, A.^8 ; Ereditato, A.^3 ; Ferragut, R.^1,2 ; Fontana, A.^6 ; Gerber, S.^8 ; Giammarchi, M.^2 ; Gligorova, A.^18 ; Gninenko, S.^4 ; Haider, S.^8 ; Holmestad, H.^19 ; Huse, T.^19 ; Jordan, E.J.^16 ; Kawada, J.^3 ; Kellerbauer, A.^16 ; Krasnicky, D.^13,14 ; Lagomarsino, V.^13,14 ; Lehner, S.^20 ; Malbrunot, C.^8,20 ; Mariazzi, S.^20 ; Matveev, V.^4 ; Mazzotta, Z.^2,15 ; Nebbia, G.^21 ; Nedelec, P.^22 ; Oberthaler, M.^7 ; Pacifico, N.^18 ; Pagano, D.^5,6 ; Penasa, L.^9,10 ; Petracek, V.^17 ; Pistillo, C.^3 ; Prelz, F.^2 ; Prevedelli, M.^23 ; Ravelli, L.^9,10 ; Riccardi, C.^6,24 ; Røhne, O.M.^19 ; Rosenberger, S.^8 ; Rotondi, A.^6,24 ; Sacerdoti, M.^2 ; Sandaker, H.^19 ; Santoro, R.^2,12 ; Scampoli, P.^3,25 ; Sorrentino, F.^14 ; Spacek, M.^17 ; Strojek, I.M.^17 ; Storey, J.^3 ; Subieta, M.^5,6 ; Testera, G.^14 ; Widmann, E.^20 ; Yzombard, P.^11 ; Zavatarelli, S.^14 ; Zmeskal, J.^20

Politecnico of Milano, Piazza Leonardo da Vinci 32, Milan

20133, Italy^1

INFN Milano, Via Celoria 16, Milan

20133, Italy^2

Laboratory for High Energy Physics, Albert Einstein Center for Fundamental Physics, University of Bern, Bern

3012, Switzerland^3

Institute for Nuclear Research, Russian Academy of Science, Moscow

117312, Russia^4

Department of Mechanical, Industrial Engineering, University of Brescia, Via Branze 38, Brescia

25123, Italy^5

INFN Pavia, Via Bassi 6, Pavia

27100, Italy^6

Kirchhoff-Institute for Physics, Heidelberg University, Im Neuenheimer Feld 227, Heidelberg

69120, Germany^7

Physics Department, CERN, Geneva 23

1211, Switzerland^8

Department of Physics, University of Trento, Via Sommarive 14, Povo, Trento

38123, Italy

(10) TIFPA/INFN Trento, Via Sommarive 14, Povo, Trento

38123, Italy

(11) Laboratory Aimé Cotton, CNRS, University of Paris-Sud, ENS Cachan, Bat. 505, Orsay

91405, France

(12) Department of Science, University of Insubria, Via Valleggio 11, Como

22100, Italy

(13) Department of Physics, University of Genova, Via Dodecaneso 33, Genova

16146, Italy

(14) INFN Genova, Via Dodecaneso 33, Genova

16146, Italy

(15) Department of Physics, University of Milano, Via Celoria 16, Milan

20133, Italy

(16) Max Planck Institute for Nuclear Physics, Saupfercheckweg 1, Heidelberg

69117, Germany

(17) Czech Technical University, Brehová 7, Prague 1, Prague

11519, Czech Republic

(18) Institute of Physics and Technology, University of Bergen, Allégaten 55, Bergen

5007, Norway

(19) Department of Physics, University of Oslo, Sem Sæilandsvei 24, Oslo

0371, Norway

(20) Stefan Meyer Institute for Subatomic Physics, Austrian Academy of Sciences, Boltzmanngasse 3, Vienna

1090, Austria

(21) INFN Padova, Via Marzolo 8, Padova

35131, Italy

(22) Institute of Nuclear Physics, CNRS/IN2p3, University of Lyon 1, Villeurbanne

69622, France

(23) University of Bologna, Viale Berti Pichat 6/2, Bologna

40126, Italy

(24) Department of Physics, University of Pavia, Via Bassi 6, Pavia

27100, Italy

(25) Department of Physics, University of Napoli Federico II, Complesso Universitario di Monte S. Angelo, Napoli

80126, Italy^9

关键词: Antihydrogen atoms;    Fundamental laws;    Gravitational accelerations;    Gravitational forces;    Nuclear emulsions;    Stark accelerator;    Vertical displacements;    Weak equivalence principle;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/631/1/012047/pdf
DOI  :  10.1088/1742-6596/631/1/012047

来源: IOP

【 摘 要 】

The goal of the AEgIS experiment is to measure the gravitational acceleration of antihydrogen - the simplest atom consisting entirely of antimatter - with the ultimate precision of 1%. We plan to verify the Weak Equivalence Principle (WEP), one of the fundamental laws of nature, with an antimatter beam. The experiment consists of a positron accumulator, an antiproton trap and a Stark accelerator in a solenoidal magnetic field to form and accelerate a pulsed beam of antihydrogen atoms towards a free-fall detector. The antihydrogen beam passes through a moiré deflectometer to measure the vertical displacement due to the gravitational force. A position and time sensitive hybrid detector registers the annihilation points of the antihydrogen atoms and their time-of-flight. The detection principle has been successfully tested with antiprotons and a miniature moiré deflectometer coupled to a nuclear emulsion detector.