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Indication of a strange tribaryon S^+ from the ^4He(stopped K^-,n) reaction
M. Iwasaki, T. Suzuki, H. Bhang +26
We measured the neutron time-of-flight spectrum in the ^4He(stopped K^-, n) reaction by stopping negative kaons in a superfluid helium target. A clear enhancement was observed in t…
Positron plasma diagnostics and temperature control for antihydrogen production
ATHENA Collaboration, M. Amoretti, C. Amsler +29
Production of antihydrogen atoms by mixing antiprotons with a cold, confined, positron plasma depends critically on parameters such as the plasma density and temperature. We discus…
Precise laser spectroscopy of the antiprotonic helium atom and CPT test on antiproton mass and charge
H. Yamaguchi, J. Eades, R. S. Hayano +8
We have measured twelve transition frequencies of the antiprotonic helium atom (pbar-He+) with precisions of 0.1--0.2 ppm using a laser spectroscopic method. The agreement between…