Precision measurement of the 3d ---> 2p x-ray energy in kaonic He-4

Jul, 2007
12 pages
Published in:
  • Phys.Lett.B 653 (2007) 387-391
e-Print:

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Abstract: (Elsevier)
We have measured the Balmer-series x-rays of kaonic 4 He atoms using novel large-area silicon drift x-ray detectors in order to study the low-energy K¯ -nucleus strong interaction. The energy of the 3d→2p transition was determined to be 6467±3(stat)±2(syst) eV . The resulting strong-interaction energy-level shift is in agreement with theoretical calculations, thus eliminating a long-standing discrepancy between theory and experiment.
Note:
  • 12 pages, 4 figues, submitted to Physics Letters B
  • 25.80.Nv
  • 13.75.Jz
  • 36.10.Gv
  • Kaonic atom
  • X-ray spectroscopy
  • Silicon drift detector
  • K- nucleus: capture
  • at rest
  • helium: superfluid
  • K-: mesic atom