Hadronic shift in pionic hydrogen

Abstract

The hadronic shift in pionic hydrogen has been redetermined to be ${\epsilon }_{1s}=7.086\pm 0.007(stat)\pm 0.006(sys)$\,eV by X-ray spectroscopy of ground state transitions applying various energy calibration schemes. The experiment was performed at the high-intensity low-energy pion beam of the Paul Scherrer Institut by using the cyclotron trap and an ultimate-resolution Bragg spectrometer with bent crystals.

10 pages, 6 figures

References in corpus (7)

• Precision calculation of the pi^- deuteron scattering length and its impact on threshold pi-N scattering
• Hadronic atoms in QCD + QED
• Pionic deuterium
• Isospin breaking in the pion-nucleon scattering lengths
• Precision determination of the dpi -> NN transition strength at threshold
• Characterization of a CCD array for Bragg spectroscopy
• Line shape of the muH(3p - 1s) hyperfine transitions

Cited by in corpus (3)

• Improved limits for Higgs-portal dark matter from LHC searches
• On the pi pi continuum in the nucleon form factors and the proton radius puzzle
• Extracting the sigma-term from low-energy pion-nucleon scattering