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.

arXiv commentAccepted in Phys. Lett. B

References in corpus (7)

• A New Measurement of Kaonic Hydrogen X rays
• Precision measurement of the $3d\to 2p$ x-ray energy in kaonic ${}^4$He
• S-Wave Scattering of Fermion Revisited
• First measurement of kaonic helium-3 X-rays
• Future directions in kaonic atom physics
• Vacuum polarization in muonic atoms: the Lamb shift at low and medium Z
• The Uehling correction to the energy levels in a pionic atom

Cited by in corpus (11)

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• A new kaonic helium measurement in gas by SIDDHARTINO at the DAΦNE collider
• New opportunities for kaonic atoms measurements from CdZnTe detectors
• Measurements of high-n transitions in intermediate mass kaonic atoms by SIDDHARTA-2 at DA$\mathrm{\Phi }$NE
• X-ray transition yields of low-Z kaonic atoms produced in Kapton
• Precision X-ray spectroscopy of kaonic atoms as a probe of low-energy kaon-nucleus interaction
• First measurement of kaonic helium-4 M-series transitions
• The kaonic atoms research program at DAΦNE: from SIDDHARTA to SIDDHARTA-2
• First tests of the full SIDDHARTA-2 experimental apparatus with a 4 He gaseous target