Search for trapped antihydrogen: First candidate events

R. Hydomako, G. B. Andresen, M. D. Ashkezari, M. Baquero-Ruiz, W. Bertsche, P. D. Bowe, C. C. Bray, E. Butler, C. L. Cesar, S. Chapman, M. Charlton, J. Fajans, T. Friesen, M. C. Fujiwara, D. R. Gill, J. S. Hangst, W. N. Hardy, R. S. Hayano, M. E. Hayden, A. J. HumphriesS. Jonsell, L. V. Jørgensen, L. Kurchaninov, R. Lambo, N. Madsen, S. Menary, P. Nolan, K. Olchanski, A. Olin, A. Povilus, P. Pusa, F. Robicheaux, E. Sarid, S. Seif El Nasr-Storey, D. M. Silveira, C. So, J. W. Storey, R. I. Thompson, D. P. Van Der Werf, D. Wilding, J. S. Wurtele, Y. Yamazaki

Research output: Contribution to journalConference articlepeer-review

Abstract

ALPHA (Antihydrogen Laser PHysics Apparatus) is an international project located at CERN whose prime goal is to perform tests of CPT symmetry on antihydrogen. While substantial numbers of antihydrogen atoms have been produced in several experiments, their trapping has not yet been achieved. In the ALPHA apparatus, cold plasmas of typically 3 × 104 antiprotons and of 4 × 106 positrons are mixed in a Penning trap to form cold antihydrogen. A multipolar magnetic trap of depth 0.5 Kelvin is superimposed on the Penning trap to confine the anti-atoms. In 2009, we have reached, for the first time, the detection sensitivity and trap conditions for which observation of antihydrogen trapping may be expected. In this talk, we will present results from that run, where we have observed first candidate events [1].

Original languageEnglish
JournalProceedings of Science
Volume120
StatePublished - 1 Jan 2010
Externally publishedYes
Event35th International Conference of High Energy Physics, ICHEP 2010 - Paris, France
Duration: 22 Jul 201028 Jul 2010

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