Proposed antimatter gravity measurement with an antihydrogen beam

Year: 2008

Authors: Kellerbauer A., Amoretti M., Belov A.S., Bonomi G., Boscolo I., Brusa R.S., Büchner M., Byakov V.M., Cabaret L., Canali C., Carraro C., Castelli F., Cialdi S., de Combarieu M., Comparat D., Consolati G., Djourelov N., Doser M., Drobychev G., Dupasquier A., Ferrari G., Forget P., Formaro L., Gervasini A., Giammarchi M.G., Gninenko S.N., Gribakin G., Hogan S.D., Jacquey M., Lagomarsino V., Manunzio G., Mariazzi S., Matveev V.A., Meier J.O., Merkt F., Nedelec P., Oberthaler M.K., Pari P., Prevedelli M., Quasso F., Rotondi A., Sillou D., Stepanov S.V., Stroke H.H., Testera G., Tino G. M., Trenec G., Vairo A., Vigue J., Walters H., Warring U., Zavatarelli S., Zvezhinskij D.S., AEGIS Proto-Collaboration

Autors Affiliation: Max Planck Institute for Nuclear Physics, Postfach 103980, 69029 Heidelberg, Germany;
Institute for Nuclear Research of the Russian Academy of Sciences, Moscow 117312, Russia;
Istituto Nazionale di Fisica Nucleare and Department of Physics, University of Pavia, via Bassi 6, 27100 Pavia, Italy;
Istituto Nazionale di Fisica Nucleare and Department of Physics, University of Milan, via Celoria 16, 20133 Milano, Italy;
Department of Physics, University of Trento, via Sommarive 14, 38100 Povo, Italy
Laboratoire Collisions Agre´gats Re´activite´ – IRSAMC, Universite´ Paul Sabatier and CNRS UMR 5589, 118 Route de Narbonne,31062 Toulouse Cedex, France;
Institute for Theoretical and Experimental Physics, Moscow 117218, Russia;
Laboratoire Aimé Cotton, CNRS II, Campus d’Orsay, 91405 Orsay Cedex, France;
Istituto Nazionale di Fisica Nucleare and Department of Physics, University of Genoa, via Dodecaneso 33, 16146 Genova, Italy;
Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy;
Laboratoire de Basse Température du SPEC/DRECAM/DSM, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France;
Institute for Nuclear Research and Nuclear Energy, 72 Tzarigradsko Chaussee, 1784 Sofia, Bulgaria;
Department of Physics, CERN, 1211 Gene`ve 23, Switzerland;
Laboratoire d’Annecy-le-Vieux de Physique des Particules, 9 Chemin de Bellevue, B.p. 110, 74941 Annecy Cedex, France;
Istituto Nazionale di Fisica Nucleare and Department of Physics, University of Florence and LENS, CNR-INFM, via Sansone 1, 50019 Firenze, Italy;
Department of Applied Mathematics and Theoretical Physics, Queen’s University, University Road, Belfast BT7 1NN, United Kingdom;
Laboratorium fϋr Physikalische Chemie, ETH Zϋrich, 8093 Zϋrich, Switzerland;
Kirchhoff Institute of Physics, University of Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany;
Department of Physics, New York University, 4 Washington Place, New York, NY 10003, USA

Abstract: The principle of the equivalence of gravitational and inertial mass is one of the cornerstones of general relativity. Considerable efforts have been made and are still being made to verify its validity. A quantum-mechanical formulation of gravity allows for non-Newtonian contributions to the force which might lead to a difference in the gravitational force on matter and antimatter. While it is widely expected that the gravitational interaction of matter and of antimatter should be identical, this assertion has never been tested experimentally. With the production of large amounts of cold antihydrogen at the CERN Antiproton Decelerator, such a test with neutral antimatter atoms has now become feasible. For this purpose, we have proposed to set up the AEGIS experiment at CERN/AD, whose primary goal will be the direct measurement of the Earth

Journal/Review: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

Volume: 266 (3)      Pages from: 351  to: 356

KeyWords: antimatter; gravity; interferometry; weak equivalence principle; positronium
DOI: 10.1016/j.nimb.2007.12.010

Citations: 229
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