%0 Journal Article
%A Gotta, Detlev
%A Amaro, F. D.
%A Anagnostopoulos, D. F.
%A Bühler, P.
%A Covita, D. S.
%A Fuhrmann, H.
%A Gorke, H.
%A Hennebach, M.
%A Hirtl, A.
%A Ishiwatari, T.
%A Indelicato, P.
%A Jensen, T. S.
%A Le Bigot, E.-O.
%A Manil, B.
%A Markushin, V. E.
%A Marton, J.
%A Nekipelov, M.
%A Pomerantsev, V. N.
%A Popov, V. P.
%A el Hassani, A. J. Rusi
%A Schlesser, S.
%A Schmid, Ph.
%A Strauch, Th.
%A Theisen, M.
%A Trassinelli, M.
%A Veloso, J. F. C. A.
%A Zmeskal, J.
%A Gruber, A.
%A Simons, L. M.
%A dos Santos, J. M. F.
%A Liu, Y.-W.
%T Pionic hydrogen and deuterium
%J The European physical journal / Web of Conferences
%V 262
%@ 2100-014X
%C Les Ulis
%I EDP Sciences
%M FZJ-2023-00422
%P 01005 -
%D 2022
%X The strong-interaction effects both in pionic hydrogen and deuteriumatoms have been re-determined with improved precision. The hadronicshift and width in pionic hydrogen together with the hadronic shift in pionicdeuterium constitute a one-fold constraint for the two independent pion-nucleonscattering lengths. Furthermore, the hadronic width in pionic deuterium measuresthe transition strength of s-wave pions on an isoscalar nucleon-nucleonpair which is an independent quantity not related to the pion-nucleon scatteringlengths. The experiment was performed at the Paul Scherrer Institute bystopping a high-intensity low-energy pion beam in gaseous targets using thecyclotron trap. The X-rays emitted by the H and D atoms were analysedwith a high resolution Bragg spectrometer equipped with spherically bent crystals.The pion-nucleon scattering lengths and other physical quantities extractedfrom the atom data are in good agreement with the results obtained from pion-nucleonand nucleon-nucleon scattering experiments and confirm that a consistentpicture is achieved for the low-energy pion-nucleon sector with respect tothe expectations of chiral perturbation theory.
%B International Conference on Exotic Atoms and Related Topics
%C 13 Sep 2021 - 17 Sep 2021, Vienna (Austria)
Y2 13 Sep 2021 - 17 Sep 2021
M2 Vienna, Austria
%F PUB:(DE-HGF)8 ; PUB:(DE-HGF)16
%9 Contribution to a conference proceedingsJournal Article
%R 10.1051/epjconf/202226201005
%U https://juser.fz-juelich.de/record/917190