https://doi.org/10.1140/epja/i2014-14190-x
Regular Article - Experimental Physics
Hadronic shift in pionic hydrogen
1
Institut für Kernphysik, Forschungszentrum Jülich, D-52425, Jülich, Germany
2
Department of Materials Science and Engineering, University of Ioannina, GR-45110, Ioannina, Greece
3
Laboratory for Particle Physics, Paul Scherrer Institut, CH-5232, Villigen, Switzerland
4
Stefan Meyer Institute for Subatomic Physics, Austrian Academy of Sciences, A-1090, Vienna, Austria
5
Laboratoire Kastler Brossel, Sorbonne Universités, UPMC Univ. Paris 06, Case 74; 4, place Jussieu, 75005, Paris, France
6
Laboratoire Kastler Brossel, CNRS, 75005, Paris, France
7
Laboratoire Kastler Brossel, Département de Physique de l’École Normale Supérieure, 24 Rue Lhomond, 75005, Paris, France
8
Faculté des Sciences et Techniques, Université Abdelmalek Essaâdi, Tanger, Morocco
9
Institut des NanoSciences de Paris, Sorbonne Universités, UPMC Univ. Paris 06, Case 840; 4, place Jussieu, Paris, France
10
Institut des NanoSciences de Paris, CNRS, F-75005, Paris, France
* e-mail: d.gotta@fz-juelich.de
Received:
17
June
2014
Revised:
31
October
2014
Accepted:
16
December
2014
Published online:
29
December
2014
The hadronic shift in pionic hydrogen has been redetermined to be ε 1s = 7.086 ± 0.007(stat) ± 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.
Key words: Calibration Line / Energy Calibration / Baru / Muonic Hydrogen / Exotic Atom
© SIF, Springer-Verlag Berlin Heidelberg, 2014