Speaker
Detlev Gotta
(Forschungszentrum Jülich)
Description
K X-rays from pionic hydrogen and deuterium as well as muonic hydrogen have been measured using a high-resolution crystal spectrometer at the E5 beam line of PSI. From the ground-state level shifts and broadenings of the hydrogen isotopes, caused by the strong interaction, low-energy parameters of QCD become accessible as are the pion-nucleon scattering lengths and the threshold production strength of pions in nucleon-nucleon collisions. Muonic hydrogen allows important insights in the deexcitation cascade of such exotic atoms, the understanding of which is essential for a precision determination of the above-mentioned quantities. First experimental results are discussed in the context of recent results from theoretical efforts within the approach of Chiral Pertubation Theory and atomic cascade calculations.
Primary author
Detlev Gotta
(Forschungszentrum Jülich)
