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Determination of the antiproton-to-electron mass ratio by precision laser spectroscopy of $\overline{p}He^{+}$
/ Hori, M (Univ. Tokyo ; CERN) ; Dax, A (Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan) ; Eades, John (Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan) ; Gomikawa, K (Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan) ; Hayano, R S (Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan) ; Ono, N (Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan) ; Pirkl, Werner (Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan) ; Widmann, E (Stefan Meyer Institut für Subatomare Physik, Boltzmanngasse 3, Vienna 1090, Austria) ; Torii, H A (Institute of Physics, University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan) ; Juhász, B (Stefan Meyer Institut für Subatomare Physik, Boltzmanngasse 3, Vienna 1090, Austria ; 5Institute of Nuclear Research of the Hungarian Academy of Sciences, H-4001 Debrecen, Hungary) et al.
A femtosecond optical frequency comb and continuous-wave pulse- amplified laser were used to measure 12 transition frequencies of antiprotonic helium to fractional precisions of (9-16) 10/sup -9lifetimes hitherto unaccessible to our precision laser spectroscopy method. Comparisons with three-body QED calculations yielded an antiproton-to-electron mass ratio of M/sub pmacron//m/sub e/=1836.152 674(5)..
2006
- Published in : Phys. Rev. Lett. 96 (2006) 243401/1-4
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5.
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Neutrons in coincidence with fission of 238U induced by stopped antiprotons
/ Von Egidy, T (Technische Univ. München) ; Neumaier, S (CERN) ; Eades, John (CERN) ; Plendl, H S (KFA Jülich) ; Machner, H (KFA Jülich) ; Schmid, W (Technische Univ. München) ; Hatmann, F J (Technische Univ. München) ; Hoffmann, J (Technische Univ. München) ; Schmid, S ; Hilscher, D (Hahn-Meitner-Institut-Berlin) et al.
1997
- Published in : Phys. Rev. C 55 (1997) 2965
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Influence of oxygen admixtures on the lifetime of metastable antiprotonic helium atoms
/ Pohl, R (Technische Universität München) ; Ishikawa, T (Univ. of Tokyo) ; Horváth, D (Research Institute for Particle and Nuclear Physics, Hungary) ; Sugai, I (Univ. of Tokyo) ; Torii, H A (Univ. of Tokyo) ; Hori, M (Univ. of Tokyo) ; Hayano, R S (Univ. of Tokyo) ; Hartmann, F J (Technische Universität München) ; Ketzer, B (Technische Universität München) ; Maierl, C (Technische Universität München) et al.
1998
- Published in : Phys. Rev. A 58 (1998) 4406-4415
APS Published version, local copy: PDF;
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7.
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Laser spectroscopic studies of state-dependent collisional quenching of the lifetimes of metastable antiprotonic helium atoms
/ Hori, M (Univ. of Tokyo) ; Hayano, R S (Univ. of Tokyo) ; Torii, H A (Univ. of Tokyo) ; Ishikawa, T (Univ. of Tokyo) ; Maas, F E (Univ. of Tokyo) ; Yamazaki, T (CERN) ; Eades, John (CERN) ; Widmann, E (CERN) ; Kumakara, M (Institute for Molecular Science, Myodaiji) ; Morita, N (Institute for Molecular Science, Myodaiji) et al.
1998
- Published in : Phys. Rev. A 57 (1998) 1968-1712
APS Published version, local copy: PDF;
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Laser-induced resonant transition at 470.724 nm in the v=n-l-1=2 cascade of metastable antiprotonic helium atoms
/ Maas, F E (Univ. of Tokyo) ; Hartmann, F J (Technische Universität München) ; Horváth, D (Research Institute for Particle and Nuclear Physics, Hungary) ; Eades, John (CERN) ; Widmann, E (CERN) ; Hayano, R S (Univ. of Tokyo) ; Ishikawa, T (Univ. of Tokyo) ; Tamura, H (Univ. of Tokyo) ; Torii ; Morita, N (Institute for Molecular Science, Myodaiji) et al.
1995
- Published in : Phys. Rev. A 52 (1995) 4266-4269
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Control of plasmas for production of ultraslow antiproton beams
/ Kuroda, N ; Torii, H A ; Shibata, M ; Nagata, Y ; Barna, D ; Horváth, D ; Hori, M (CERN) ; Eades, John ; Mohri, A ; Komaki, K et al.
To produce ultraslow antiproton beams, decelerated antiprotons were captured in an electro‐magnetic trap and cooled by collisions with preloaded electrons. This electron cooling feature was nondestructively monitored by measurement of electrostatic oscillations of the confined electron plasma. [...]
2005
- Published in : AIP Conf. Proc. 793 (2005) 307-317
In : Conference on Physics with Ultra Slow Antiproton Beams, Wako, Japan, 14 - 16 Mar 2005, pp.307-317
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Production of ultra-slow antiproton beams
/ Torii, Hiroyuki A ; Kuroda, N ; Shibata, M ; Nagata, Y ; Barna, D ; Hori, M (CERN) ; Eades, John ; Mohri, A ; Komaki, K ; Yamazaki, Y
We have recently succeeded in decelerating and confining millions of antiprotons, 50 times more efficiently than conventional methods, in an electromagnetic trap. These antiprotons were cooled by preloaded electron plasma to an energy below an electronvolt. [...]
2005
- Published in : AIP Conf. Proc. 793 (2005) 293-306
In : Conference on Physics with Ultra Slow Antiproton Beams, Wako, Japan, 14 - 16 Mar 2005, pp.293-306
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