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@ARTICLE{Gotta:917190,
      author       = {Gotta, Detlev and Amaro, F. D. and Anagnostopoulos, D. F.
                      and Bühler, P. and Covita, D. S. and Fuhrmann, H. and
                      Gorke, H. and Hennebach, M. and Hirtl, A. and Ishiwatari, T.
                      and Indelicato, P. and Jensen, T. S. and Le Bigot, E.-O. and
                      Manil, B. and Markushin, V. E. and Marton, J. and Nekipelov,
                      M. and Pomerantsev, V. N. and Popov, V. P. and el Hassani,
                      A. J. Rusi and Schlesser, S. and Schmid, Ph. and Strauch,
                      Th. and Theisen, M. and Trassinelli, M. and Veloso, J. F. C.
                      A. and Zmeskal, J. and Gruber, A. and Simons, L. M. and dos
                      Santos, J. M. F. and Liu, Y.-W.},
      title        = {{P}ionic hydrogen and deuterium},
      journal      = {The European physical journal / Web of Conferences},
      volume       = {262},
      issn         = {2100-014X},
      address      = {Les Ulis},
      publisher    = {EDP Sciences},
      reportid     = {FZJ-2023-00422},
      pages        = {01005 -},
      year         = {2022},
      abstract     = {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.},
      month         = {Sep},
      date          = {2021-09-13},
      organization  = {International Conference on Exotic
                       Atoms and Related Topics, Vienna
                       (Austria), 13 Sep 2021 - 17 Sep 2021},
      cin          = {IKP-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IKP-2-20111104},
      pnm          = {612 - Cosmic Matter in the Laboratory (POF4-612)},
      pid          = {G:(DE-HGF)POF4-612},
      typ          = {PUB:(DE-HGF)8 / PUB:(DE-HGF)16},
      doi          = {10.1051/epjconf/202226201005},
      url          = {https://juser.fz-juelich.de/record/917190},
}