Pionic Hydrogen at PSI
D. Gotta
Abstract
The measurement of the pion-nucleon scattering lengths constitutes a high-precision test of the methods of Chiral Pertubation Theory, which is the low-energy approach of QCD. The pion-nucleon s-wave scattering lengths are related to the strong-interaction shift and width of the s-states of the pionic hydrogen atom. Shift and width are determined from the measured energies and line widths of X-ray transitions to the 1s ground state when compared to the calculated electromagnetic values. A new experiment, set up at the Paul-Scherrer-Institut, has completed a first series of measurements.
Create a lesson
Related papers
First Observation of the Radiative Decay D0 γω
BESIII Collaboration, M. Ablikim, M. N. Achasov et al.
Hyperon--nucleon interactions at BESIII
Hong-Fei Shen
Measurement of electromagnetic transition form factors in two-photon collisions at BESIII
Max Lellmann
Measurement of Born cross sections of e+e- pK-Σ0 + c.c. at s = 3.5-4.9 GeV and partial wave analysis at s = 3.773 GeV
BESIII Collaboration, M. Ablikim, M. N. Achasov et al.
MoEDAL-MAPP: the first dedicated search experiment at the LHC
John R. Ellis, Nick E. Mavromatos, Vasiliki A. Mitsou et al.
Achieving a 0.49 keV threshold in the COSINE-100 dark matter experiment
J. Kim, N. Carlin, D. F. F. S. Cavalcante et al.