Antihydrogen physics: gravitation and spectroscopy in AEgIS

Year: 2011

Authors: Ferragut R., Belov A.S., Bonomi G., I. Boscolo I., Brusa R.S, Byakov V.M., Cabaret L., Calloni A., Canali C., Carraro C., Castelli F., Cialdi S., Comparat D., Consolati G., Dassa L., Djourelov N., Doser M., Drobychev G., Dudarev A., Dupasquier A., Ferrari G., Fischer A., Folegati P., Fontana A., Formaro L., Giammarchi M.G., Gninenko S.N., Heyne R., Hogan S.D., Jorgensen L.V., Kellerbauer A., Krasnicky D., Lagomarsino V,, Manuzio G., Mariazzi S., Matveev V.A., Morhard C., Nebbia G., Nedelec P., Oberthaler M.K., Perini D., Petracek V., Prelz F., Prevedelli M., Al-Qaradawi I.Y., Quasso F., Riccardi C., Rohne O., Rotondi A., Sacerdoti M., Sandaker H., Sillou D., Stepanov S.V., Stroke H.H., Testera G., Trezzi D., Turbabin A.V., Vaccarone R., Villa F., Warring U., Zavatarelli S., Zenoni A., Zvezhinskij D.S

Autors Affiliation: Ist Nazl Fis Nucl, I-20133 Milan, Italy;
Politecn Milan, Dept Phys, I-20133 Milan, Italy;
Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia;
Univ Milan, Dept Phys, I-20133 Milan, Italy;
Ist Nazl Fis Nucl, I-27100 Pavia, Italy;
Univ Pavia, Dept Phys, I-27100 Pavia, Italy;
Univ Trent, Dept Phys, I-38100 Povo, Italy;
Inst Theoret & Expt Phys, Moscow 117218, Russia ;
Univ Paris 11, CNRS, Aime Cotton Lab, F-91405 Orsay, France;
Ist Nazl Fis Nucl, I-16146 Genoa, Italy;
Univ Genoa, Dept Phys, I-16146 Genoa, Italy;
Inst Nucl Energy Res, Sofia 1784, Bulgaria;
CERN, Dept Phys, CH-1211 Geneva 23, Switzerland;
Lab Annecy Le Vieux Phys Particules, F-74941 Annecy, France;
Univ Florence, CNR, INO, Ist Nazl Fis Nucl,LENS, I-50019 Florence, Italy;
Max Planck Inst Nucl Phys, D-69029 Heidelberg, Germany
ETH, Phys Chem Lab, CH-8093 Zurich, Switzerland;
Qatar Univ, Doha, Qatar;
Ist Nazl Fis Nucl, I-35131 Padua, Italy;
Univ Padua, Dept Phys, I-35131 Padua, Italy;
Univ Heidelberg, Kirchhoff Inst Phys, D-69120 Heidelberg, Germany,
Czech Tech Univ, Fac Nucl Sci & Phys Engn, CR-11519 Prague, Czech Republic;
Univ Oslo, Dept Phys, NO-0316 Oslo, Norway;
Univ Bermen, Dept Phys & Technol, NO-5007 Bergen, Norway;
NYU, Dept Phys, New York, NY 10003 USA

Abstract: AEgIS (Antimatter experiment: gravity, interferometry, spectroscopy) is an experiment approved by CERN with the goal of studying antihydrogen physics. In AEgIS, antihydrogen will be produced by charge exchange reactions of cold antiprotons with positronium atoms excited in a Rydberg state (n > 20). In the first phase of the experiment, controlled acceleration by an electric field gradient (Stark effect) and subsequent measurement of free fall in a Moire deflectometer will allow a test of the weak equivalence principle. In a second phase, the antihydrogen will be slowed, confined, and laser-cooled to perform CPT studies and detailed spectroscopy. In the present work, after a general description of the experiment, the present status of advancement will be reviewed, with special attention to the production and excitation of positronium atoms.

Journal/Review: CANADIAN JOURNAL OF PHYSICS (PRINT)

Volume: 89 (1)      Pages from: 17  to: 24

KeyWords: antihydrogen; gravitation; antiproton; positron;
DOI: 10.1139/P10-099

Citations: 10
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