Measurements of the strong-interaction widths of the kaonic 3He and 4He 2p levels

Abstract

The kaonic 3He and 4He X-rays emitted in the 3d-2p transitions were measured in the SIDDHARTA experiment. The widths of the kaonic 3He and 4He 2p states were determined to be Gamma_2p(3He) = 6 \pm 6 (stat.) \pm 7 (syst.) eV, and Gamma_2p(4He) = 14 \pm 8 (stat.) \pm 5 (syst.) eV, respectively. Both results are consistent with the theoretical predictions. The width of kaonic 4He is much smaller than the value of 55 \pm 34 eV determined by the experiments performed in the 70's and 80's, while the width of kaonic 3He was determined for the first time.

Accepted in Phys. Lett. B

References in corpus (3)

• Precision measurement of the $3d\to 2p$ x-ray energy in kaonic ${}^4$He
• S-Wave Scattering of Fermion Revisited
• Vacuum polarization in muonic atoms: the Lamb shift at low and medium Z

Cited by in corpus (6)

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• A new kaonic helium measurement in gas by SIDDHARTINO at the DAΦNE collider
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• Measurements of high-n transitions in intermediate mass kaonic atoms by SIDDHARTA-2 at DA$\mathrm{\Phi }$NE
• First measurement of kaonic helium-4 M-series transitions
• First tests of the full SIDDHARTA-2 experimental apparatus with a 4 He gaseous target