| Autor: |
B. Juhász, S. Friedreich, Nicola Zurlo, L. Venturelli, Dezso Horvath, Andreas Dax, Eberhard Widmann, T. Pask, D. Barna, Anna Sótér, Masaki Hori, Ryugo S. Hayano |
| Rok vydání: |
2013 |
| Předmět: |
|
| Zdroj: |
AIP Conference Proceedings. |
| ISSN: |
0094-243X |
| DOI: |
10.1063/1.4826739 |
| Popis: |
We report our latest results from our two-photon spectroscopy of antiprotonic helium (a bound state of a helium nucleus, an electron and an antiproton). By measuring three transition frequencies with a precision of 2.3−5×10−9 and comparing these to 3-body QED calculations, we derived the antiproton-electron mass ratio 1,836.1526736(23),which agrees with the proton-electron mass ratio (known to a three-times better precision) within the errors. Since the (anti)proton's atomic mass is known to a better precision than that of the electron, assuming mp = mp this result can be used to determine the electron's atomic mass as me=0.0005485799091(7) u. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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