Precision measurements of kaonic atoms at DAΦNE and future perspectives

C Curceanu ,M Catitti,V Lucherini,P Levi Sandri,F Ghio,A M Bragadireanu,M Iliescu,C Guaraldo,M Bazzi,T Ishiwatari,D Pietreanu,T Ponta,B Girolami,P Lechner ,E Widmann ,G Beer ,A Longoni ,F Sirghi ,M Cargnelli ,L Strüder ,H Soltau ,D Sirghi ,T Frizzi ,L Bombelli ,J Márton ,C Fiorini ,Paul Kienle ,J Zmeskal

doi:10.1007/978-3-540-72516-9_37

Abstract

The DAΦNE electron-positron collider at the Frascati National Laboratories has made available a unique “beam” of negative kaons providing unprecedented conditions for the study of the low-energy kaon-nucleon interaction, a field still largely unexplored. The DEAR (DAΦNE Exotic Atom Research) experiment at DAΦNE and its successor SIDDHARTA (Silicon Drift Detector for Hadronic Atom Research by Timing Application) aim at a precision measurement of the strong-interaction shift and width of the fundamental 1s level, via the measurement of the X-ray transitions to this level, for kaonic hydrogen and kaonic deuterium. The aim is to extract the isospin-dependent antikaon-nucleon scattering lengths and to contribute to the understanding of aspects of chiral symmetry breaking in the strangeness sector.

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