Kaonic Deuterium in the Excited States

New experimental measurements of the energy level displacements of the ground states of kaonic hydrogen and deuterium should give new constraints on the S-wave scattering amplitude of a negatively charged kaon by the proton and the deuteron at threshold. These experiments are planned by the SMI (The Stefan Meyer Institute of Subatomic Physics of the Austrian Academy of Sciences) in the content of the DEAR/SIDDHARTA Collaboration on the end of the year 2006 and the beginning of 2007. The main tool for the measurements of the energy level displacements of the ground states of kaonic atoms is the detection of X-rays caused by radiative transitions from the excited states to the ground state of kaonic atoms. The knowledge of the energy level displacements of the excited states of kaonic atoms is very important for the theoretical analysis of the X-ray spectra and yields. The former is necessary for the correct extraction of the energy level displacements of the ground states from the experimental spectra of the X-ray transitions. The main aim of the project is to calculate the energy level displacement of the excited nL states (L = 1) of kaonic deuterium in terms of the P-wave amplitudes of elastic and inelastic scattering of the negatively charged kaon by the deuteron. The theoretical basis for this analysis is chiral dynamics described by the chiral Lagrangian with the non-linear realisation of chiral SU(3) x SU(3) symmetry and derivative meson-baryon couplings, used in ChPT and non- perturbative coupled-channels techniques.

New experimental measurements of the energy level displacements of the ground states of kaonic hydrogen and deuterium should give new constraints on the S-wave scattering amplitude of a negatively charged kaon by the proton and the deuteron at threshold. These experiments are planned by the SMI (The Stefan Meyer Institute of Subatomic Physics of the Austrian Academy of Sciences) in the content of the DEAR/SIDDHARTA Collaboration on the end of the year 2006 and the beginning of 2007. The main tool for the measurements of the energy level displacements of the ground states of kaonic atoms is the detection of X-rays caused by radiative transitions from the excited states to the ground state of kaonic atoms. The knowledge of the energy level displacements of the excited states of kaonic atoms is very important for the theoretical analysis of the X-ray spectra and yields. The former is necessary for the correct extraction of the energy level displacements of the ground states from the experimental spectra of the X-ray transitions. The main aim of the project is to calculate the energy level displacement of the excited nL states (L = 1) of kaonic deuterium in terms of the P-wave amplitudes of elastic and inelastic scattering of the negatively charged kaon by the deuteron. The theoretical basis for this analysis is chiral dynamics described by the chiral Lagrangian with the non-linear realisation of chiral SU(3) x SU(3) symmetry and derivative meson-baryon couplings, used in ChPT and non-perturbative coupled-channels techniques.