Precision Spectroscopy of Kaonic Atoms at DAΦNE

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

doi:10.1051/epjconf/20100303023

Abstract

The SIDDHARTA experiment aims at a precise measurement of K-series kaonic hydrogen x-rays and the first-ever measurement of the kaonic deuterium x-rays 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.

Highlights

More than a quarter of a century ago, R.H
Dalitz made the following statement [1] : The most important experiments to be carried out in low-energy K-meson physics today is the definitive determination of the energy level shift in K− p and K−d atoms, because of their direct connection with the physics of the KN interaction and their complete independence from all other kinds of measurements which bear on this interaction
∆E1s is defined as ∆E1s ≡ −(E1s − E1EsM ), where E1s is the energy of the 1s level and E1EsM is the energy calculated using only the electromagnetic interaction (EM)

Summary

Introduction

More than a quarter of a century ago, R.H. Dalitz made the following statement [1] : The most important experiments to be carried out in low-energy K-meson physics today is the definitive determination of the energy level shift in K− p and K−d atoms, because of their direct connection with the physics of the KN interaction and their complete independence from all other kinds of measurements which bear on this interaction.These measurements are eagerly awaited while many studies on the K -nucleus interaction (e.g., deeplybound K -nucleus states) have been intensively performed both experimentally and theoretically over the past several years. The measured strong-interaction 1s-energy-level shift ∆E1s 1 and width Γ1s for kaonic hydrogen can be related to real and imaginary part of complex K− p S-wave scattering length aK− p by the Deser-Truemann formula [2] :

Results

Conclusion