出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The SIDDHARTA collaboration has measured the K-series x rays of kaonic hydrogen and kaonic deuterium atoms, and the L-series x rays of kaonic helium-3 and kaonic helium-4 atoms to determine the strong-interaction energy-level shift and width of the lowest lying atomic states. These measurements offer a unique possibility to precisely determine the isospin-dependent K-nucleon scattering lengths and fruitful knowledge concerning kaon-nucleus low energy interaction. Especially for kaonic hydrogen, the system composed of a K− and a proton is a simple and sensitive testing ground for low energy QCD in the strangeness sector. In this paper, we present an overview of this experiment and preliminary spectra of those kaonic x rays.
