EPJ Web of Conferences (Jan 2022)
Pionic hydrogen and deuterium
- Gotta D.,
- Amaro F.D.,
- Anagnostopoulos D.F.,
- Bühler P.,
- Covita D.S.,
- Fuhrmann H.,
- Gorke H.,
- Gruber A.,
- Hennebach M.,
- Hirtl A.,
- Ishiwatari T.,
- Indelicato P.,
- Jensen T.S.,
- Le Bigot E.-O.,
- Liu Y.-W.,
- Manil B.,
- Markushin V.E.,
- Marton J.,
- Nekipelov M.,
- Pomerantsev V.N.,
- Popov V.P.,
- el Hassani A. J. Rusi,
- dos Santos J. M. F.,
- Schlesser S.,
- Schmid Ph.,
- Simons L.M.,
- Strauch Th.,
- Theisen M.,
- Trassinelli M.,
- Veloso J. F. C. A.,
- Zmeskal J.
Affiliations
- Gotta D.
- Institut für Kernphysik, Forschungszentrum Jülich
- Amaro F.D.
- LIBPhys, Physics Department, Coimbra University
- Anagnostopoulos D.F.
- Dept. of Materials Sci. and Eng., University of Ioannina
- Bühler P.
- Stefan Meyer Institute for Subatomic Physics, Austrian Academy of Sciences
- Covita D.S.
- LIBPhys, Physics Department, Coimbra University
- Fuhrmann H.
- Stefan Meyer Institute for Subatomic Physics, Austrian Academy of Sciences
- Gorke H.
- Zentralinstitut für Elektronik, Forschungszentrum Jülich
- Gruber A.
- Stefan Meyer Institute for Subatomic Physics, Austrian Academy of Sciences
- Hennebach M.
- Institut für Kernphysik, Forschungszentrum Jülich
- Hirtl A.
- Stefan Meyer Institute for Subatomic Physics, Austrian Academy of Sciences
- Ishiwatari T.
- Stefan Meyer Institute for Subatomic Physics, Austrian Academy of Sciences
- Indelicato P.
- LKB, Sorbonne Université, CNRS, ENS-PSL, Collège de France
- Jensen T.S.
- Laboratory for Particle Physics, Paul Scherrer Institute
- Le Bigot E.-O.
- LKB, Sorbonne Université, CNRS, ENS-PSL, Collège de France
- Liu Y.-W.
- Laboratory for Particle Physics, Paul Scherrer Institute
- Manil B.
- LKB, Sorbonne Université, CNRS, ENS-PSL, Collège de France
- Markushin V.E.
- Laboratory for Particle Physics, Paul Scherrer Institute
- Marton J.
- Stefan Meyer Institute for Subatomic Physics, Austrian Academy of Sciences
- Nekipelov M.
- Institut für Kernphysik, Forschungszentrum Jülich
- Pomerantsev V.N.
- Skobeltsyn Inst. of Nuclear Physics, Lomonossov Moscow State University
- Popov V.P.
- Skobeltsyn Inst. of Nuclear Physics, Lomonossov Moscow State University
- el Hassani A. J. Rusi
- Faculté des Sciences et Techniques, Université Abdelmalek Essaâdi
- dos Santos J. M. F.
- LIBPhys, Physics Department, Coimbra University
- Schlesser S.
- LKB, Sorbonne Université, CNRS, ENS-PSL, Collège de France
- Schmid Ph.
- Stefan Meyer Institute for Subatomic Physics, Austrian Academy of Sciences
- Simons L.M.
- Laboratory for Particle Physics, Paul Scherrer Institute
- Strauch Th.
- Institut für Kernphysik, Forschungszentrum Jülich
- Theisen M.
- Institut für Kernphysik, Forschungszentrum Jülich
- Trassinelli M.
- Institut des NanoSciences de Paris, CNRS, Sorbonne Université
- Veloso J. F. C. A.
- I3N, Dept. of Physics, Aveiro University
- Zmeskal J.
- Stefan Meyer Institute for Subatomic Physics, Austrian Academy of Sciences
- DOI
- https://doi.org/10.1051/epjconf/202226201005
- Journal volume & issue
-
Vol. 262
p. 01005
Abstract
The strong-interaction effects both in pionic hydrogen and deuterium atoms have been re-determined with improved precision. The hadronic shift and width in pionic hydrogen together with the hadronic shift in pionic deuterium constitute a one-fold constraint for the two independent pion-nucleon scattering lengths. Furthermore, the hadronic width in pionic deuterium measures the transition strength of s-wave pions on an isoscalar nucleon-nucleon pair which is an independent quantity not related to the pion-nucleon scattering lengths. The experiment was performed at the Paul Scherrer Institute by stopping a high-intensity low-energy pion beam in gaseous targets using the cyclotron trap. The X-rays emitted by the πH and πD atoms were analysed with a high resolution Bragg spectrometer equipped with spherically bent crystals. The pion-nucleon scattering lengths and other physical quantities extracted from the atom data are in good agreement with the results obtained from pionnucleon and nucleon-nucleon scattering experiments and confirm that a consistent picture is achieved for the low-energy pion-nucleon sector with respect to the expectations of chiral perturbation theory.
