Faculté des sciences

Measurement of the kaonic Hydrogen X-ray spectrum

Beer, G. ; Bragadireanu, A. M. ; Cargnelli, M. ; Curceanu-Petrascu, C. ; Egger, J.-P. ; Fuhrmann, H. ; Guaraldo, C. ; Iliescu, M. ; Ishiwatari, T. ; Itahashi, K. ; Iwasaki, M. ; Kienle, P. ; Koike, T. ; Lauss, B. ; Lucherini, V. ; Ludhova, Livia ; Marton, J. ; Mulhauser, Françoise ; Ponta, T. ; Schaller, Lukas A. ; Seki, R. ; Sirghi, D. L. ; Sirghi, F. ; Zmeskal, J.

In: Physical Review Letters, 2005, vol. 94, p. 212302

The DEAR (DAΦNE exotic atom research) experiment measured the energy of x rays emitted in the transitions to the ground state of kaonic hydrogen. The measured values for the shift ε and the width Γ of the 1s state due to the K⁻p strong interaction are ε1s=-193±37 (stat) ±6 (syst) eV and Γ1s=249±111 (stat) ±30 (syst) eV, the most... Plus

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    Summary
    The DEAR (DAΦNE exotic atom research) experiment measured the energy of x rays emitted in the transitions to the ground state of kaonic hydrogen. The measured values for the shift ε and the width Γ of the 1s state due to the Kp strong interaction are ε1s=-193±37 (stat) ±6 (syst) eV and Γ1s=249±111 (stat) ±30 (syst) eV, the most precise values yet obtained. The pattern of the kaonic hydrogen K-series lines, Kα, Kβ, and Kγ, was disentangled for the first time.