Considerable efforts have been made and are still being made to verify the validity of the principle of the equivalence of gravitational and inertial mass, one of the cornerstones of the classical theory of general relativity. Specific attempts at quantummechanical formulations of gravity allow for non-Newtonian contributions, which might lead to a difference in the gravitational force on matter and antimatter. While it is widely expected that the gravitational interaction is independent of the composition of bodies, this has only been tested for matter systems, but never yet for antimatter systems. By combining techniques from different fields, and relying on recent developments in the production of Positronium and ongoing work to laser-excite Positronium to Rydberg states, such a test with neutral antimatter has become feasible. The primary goal of the AEGIS experiment being built at the Antiproton Decelerator at CERN is to carry out the first direct measurement of the Earth's gravitational acceleration on antihydrogen by means of a classical Moiré deflectometer.
Measuring the fall of antihydrogen : the AEGIS experiment at CERN / M. Doser, Y. Allkofer, C. Amsler, A.S. Belov, G. Bonomi, I. Boscolo, R.S. Brusa, V.M. Byakov, L. Cabaret, A. Calloni, C. Canali, C. Carraro, F. Castelli, S. Cialdi, D. Comparat, G. Consolati, L. Dassa, N. Djourelov, G. Drobychev, A. Dudarev, A. Dupasquier, R. Ferragut, G. Ferrari, A. Fischer, P. Folegati, A. Fontana, L. Formaro, M.G. Giammarchi, S.N. Gninenko, F. Haupert, R. Heyne, S.D. Hogan, L.W. Jorgensen, T. Kaltenbacher, A. Kellerbauer, D. Krasnicky, V. Lagomarsino, G. Manuzio, S. Mariazzi, V.A. Matveev, F. Merkt, C. Morhard, G. Nebbia, P. Nedelec, M.K. Oberthaler, D. Perini, V. Petracek, F. Prelz, M. Prevedelli, I.Y. Al-Qaradawi, F. Quasso, C. Regenfus, C. Riccardi, O. Rohne, A. Rotondi, M. Sacerdoti, H. Sandaker, D. Sillou, S.V. Stepanov, J. Storey, H.H. Stroke, G. Testera, D. Trezzi, A.V. Turbabin, R. Vaccarone, F. Villa, H. Walters, U. Warring, S. Zavatarelli, A. Zenoni, D.S. Zvezhinskij. - In: PHYSICS PROCEDIA. - ISSN 1875-3892. - 17(2011), pp. 49-56. ((Intervento presentato al 2. convegno International workshop on the physics of fundamental symmetries and interactions : PSI tenutosi a Villigen nel 2010.
Measuring the fall of antihydrogen : the AEGIS experiment at CERN
I. Boscolo;F. Castelli;S. Cialdi;M.G. Giammarchi;F. Prelz;M. Sacerdoti;D. Trezzi;
2011
Abstract
Considerable efforts have been made and are still being made to verify the validity of the principle of the equivalence of gravitational and inertial mass, one of the cornerstones of the classical theory of general relativity. Specific attempts at quantummechanical formulations of gravity allow for non-Newtonian contributions, which might lead to a difference in the gravitational force on matter and antimatter. While it is widely expected that the gravitational interaction is independent of the composition of bodies, this has only been tested for matter systems, but never yet for antimatter systems. By combining techniques from different fields, and relying on recent developments in the production of Positronium and ongoing work to laser-excite Positronium to Rydberg states, such a test with neutral antimatter has become feasible. The primary goal of the AEGIS experiment being built at the Antiproton Decelerator at CERN is to carry out the first direct measurement of the Earth's gravitational acceleration on antihydrogen by means of a classical Moiré deflectometer.
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