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Direct Measurement of Transition Frequencies in Isolated<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mover accent="true"><mml:mi>p</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:msup><mml:mrow><mml:mi mathvariant="normal">H</mml:mi><mml:mi mathvariant="normal">e</mml:mi></mml:mrow><mml:mo>+</mml:mo></mml:msup></mml:math>Atoms, and New<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi><mml:mi>T</mml:mi></mml…

M. Hori,J. Eades,R. S. Hayano,Takashi Ishikawa,W. Pirkl,E. Widmann,H. Yamaguchi,H. A. Torii,B. Juhász,Dezsö Horváth,T. Yamazaki

Antiproton

Physics

Atomic physics

2003

A radio frequency quadrupole decelerator and achromatic momentum analyzer were used to decelerate antiprotons and produce $\overline{p}^{4}\mathrm{H}\mathrm{e}^{+}$ and $\overline{p}^{3}\mathrm{H}\mathrm{e}^{+}$ atoms in ultra-low-density targets, where collision-induced shifts of the atomic transition frequencies were negligible. The frequencies at near-vacuo conditions were measured by laser spectroscopy to fractional precisions of $(6--19)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}8}$. By comparing these with QED calculations and the antiproton cyclotron frequency, we set a new limit of $1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}8}$ on possible differences between the antiproton and proton charges and masses.

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“Direct Measurement of Transition Frequencies in Isolated<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mover accent="true"><mml:mi>p</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:msup><mml:mrow><mml:mi mathvariant="normal">H</mml:mi><mml:mi mathvariant="normal">e</mml:mi></mml:mrow><mml:mo>+</mml:mo></mml:msup></mml:math>Atoms, and New<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi><mml:mi>T</mml:mi></mml…” is a paper by M. Hori J. Eades R. S. Hayano Takashi Ishikawa W. Pirkl E. Widmann H. Yamaguchi H. A. Torii B. Juhász Dezsö Horváth T. Yamazaki published in 2003. It has an Open Access status of “green”. You can read and download a PDF Full Text of this paper here.