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Alternative method for reconstruction of antihydrogen annihilation vertices |
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| Authors: | C. Amole M. D. Ashkezari G. B. Andresen M. Baquero-Ruiz W. Bertsche P. D. Bowe E. Butler C. L. Cesar S. Chapman M. Charlton A. Deller S. Eriksson J. Fajans T. Friesen M. C. Fujiwara D. R. Gill A. Gutierrez J. S. Hangst W. N. Hardy R. S. Hayano M. E. Hayden A. J. Humphries R. Hydomako S. Jonsell L. Kurchaninov N. Madsen S. Menary P. Nolan K. Olchanski A. Olin A. Povilus P. Pusa F. Robicheaux E. Sarid D. M. Silveira C. So J. W. Storey R. I. Thompson D. P. van der Werf J. S. Wurtele Y. Yamazaki |
| Affiliation: | 1. Department of Physics and Astronomy, York University, Toronto, ON, M3J 1P3, Canada 2. Department of Physics, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada 3. Department of Physics and Astronomy, Aarhus University, 8000, Aarhus C, Denmark 4. Department of Physics, University of California, Berkeley, CA, 94720-7300, USA 5. Department of Physics, Swansea University, Swansea, SA2 8PP, UK 6. Physics Department, CERN, 1211, Geneva 23, Switzerland 7. Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, 21941-972, Brazil 8. Department of Physics and Astronomy, University of Calgary, Calgary, AB, T2N 1N4, Canada 9. TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, V6T 2A3, Canada 10. Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada 11. Department of Physics, University of Tokyo, Tokyo, 113-0033, Japan 12. Fysikum, Stockholm University, 10609, Stockholm, Sweden 13. Department of Physics, University of Liverpool, Liverpool, L69 7ZE, UK 14. Department of Physics, Auburn University, Auburn, AL, 36849-5311, USA 15. Department of Physics, NRCN-Nuclear Research Center Negev, Beer Sheva, 84190, Israel 16. Atomic Physics Laboratory, RIKEN Advanced Science Institute, Wako, Saitama, 351-0198, Japan 17. Graduate School of Arts and Sciences, University of Tokyo, Tokyo, 153-8902, Japan |
| Abstract: | The ALPHA experiment, located at CERN, aims to compare the properties of antihydrogen atoms with those of hydrogen atoms. The neutral antihydrogen atoms are trapped using an octupole magnetic trap. The trap region is surrounded by a three layered silicon detector used to reconstruct the antiproton annihilation vertices. This paper describes a method we have devised that can be used for reconstructing annihilation vertices with a good resolution and is more efficient than the standard method currently used for the same purpose. |
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