Strong-interaction shifts and widths of kaonic helium isotopes

T Ishiwatari,F Ghio,C Guaraldo,D Pietreanu,H Tatsuno,M Iwasaki,P Levi Sandri,A Romero Vidal,M Bazzi,B Wünschek,E Sbardella,M Iliescu,T Ponta,M Cargnelli ,D Sirghi ,V Tudorache ,G Beer ,T Frizzi ,A Scordo ,O Vázquez Doce ,A Rizzo ,F Sirghi ,R Hayano ,S Okada ,A Longoni ,A D’uffizi ,J Márton ,A Tudorache ,L Bombelli ,C Fiorini ,E Widmann ,A M Bragadireanu ,C Curceanu ,Paul Kienle ,H Shi ,J Zmeskal

doi:10.1016/j.nuclphysa.2012.12.020

Strong-interaction shifts and widths of kaonic helium isotopes

T Ishiwatari, F Ghio + Show 34 more

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https://doi.org/10.1016/j.nuclphysa.2012.12.020

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Journal: Nuclear physics. A	Publication Date: Dec 10, 2012
Citations: 1	License type: cc-by-nc-nd

Affiliation: Stefan Meyer Institute for Subatomic Physics, National Laboratory of Frascati, RIKEN, The University of Tokyo, Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering, University of Victoria, Politecnico di Milano, Technical University of Munich

#Large-area Silicon-drift Detectors #Kaonic 3He + Show 8 more

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Abstract

The kaonic 3He and 4He transitions in gaseous targets were observed by the SIDDHARTA experiment. The X-ray energies of these transitions were measured with large-area silicon-drift detectors using the timing information of the pairs produced by the DAΦNE collider. The strong-interaction shifts and widths both of the kaonic 3He and 4He 2p states were determined, which are much smaller than the results obtained by the previous experiments. The “kaonic helium puzzle” (a discrepancy between theory and experiment) was now resolved.

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