EPJ Web of Conferences (Jan 2016)

Precision X-ray spectroscopy of kaonic atoms as a probe of low-energy kaon-nucleus interaction

  • Shi H.,
  • Bazzi M.,
  • Beer G.,
  • Bellotti G.,
  • Berucci C.,
  • Bragadireanu A.M.,
  • Bosnar D.,
  • Cargnelli M.,
  • Curceanu C.,
  • Butt A.D.,
  • d’Uffizi A.,
  • Fiorini C.,
  • Ghio F.,
  • Guaraldo C.,
  • Hayano R.S.,
  • Iliescu M.,
  • Ishiwatari T.,
  • Iwasaki M.,
  • Levi Sandri P.,
  • Marton J.,
  • Okada S.,
  • Pietreanu D.,
  • Piscicchia K.,
  • Romero Vidal A.,
  • Sbardella E.,
  • Scordo A.,
  • Sirghi D.L.,
  • Sirghi F.,
  • Tatsuno H.,
  • Vazquez Doce O.,
  • Widmann E.,
  • Zmeskal J.

DOI
https://doi.org/10.1051/epjconf/201612604045
Journal volume & issue
Vol. 126
p. 04045

Abstract

Read online

In the exotic atoms where one atomic 1s electron is replaced by a K−, the strong interaction between the K− and the nucleus introduces an energy shift and broadening of the low-lying kaonic atomic levels which are determined by only the electromagnetic interaction. By performing X-ray spectroscopy for Z = 1,2 kaonic atoms, the SIDDHARTA experiment determined with high precision the shift and width for the 1s state of K− p and the 2p state of kaonic helium-3 and kaonic helium-4. These results provided unique information of the kaon-nucleus interaction in the low energy limit.