Pionic hydrogen and deuterium

Gotta, Detlev; Bühler, P.; Strauch, Th.; dos Santos, J. M. F.; Jensen, T. S.; Zmeskal, J.; Popov, V. P.; Liu, Y.-W.; Anagnostopoulos, D. F.; Indelicato, P.; Amaro, F. D.; Marton, J.; Le Bigot, E.-O.; Hennebach, M.; Simons, L. M.; Pomerantsev, V. N.; Nekipelov, M.; Gruber, A.; Manil, B.; Schmid, Ph.; Gorke, H.; Theisen, M.; Schlesser, S.; Ishiwatari, T.; Covita, D. S.; Hirtl, A.; el Hassani, A. J. Rusi; Fuhrmann, H.; Veloso, J. F. C. A.; Trassinelli, M.; Markushin, V. E.

doi:10.1051/epjconf/202226201005

Contribution to a conference proceedings/Journal Article

FZJ-2023-00422

Pionic hydrogen and deuterium

Gotta, D. (Corresponding author)FZJ* ; Amaro, F. D. ; Anagnostopoulos, D. F. ; Bühler, P. ; Covita, D. S. ; Fuhrmann, H. ; Gorke, H. ; Hennebach, M.FZJ* ; Hirtl, A. ; Ishiwatari, T. ; Indelicato, P. ; Jensen, T. S. ; Le Bigot, E.-O. ; Manil, B. ; Markushin, V. E. ; Marton, J. ; Nekipelov, M. ; Pomerantsev, V. N. ; Popov, V. P. ; el Hassani, A. J. R. ; Schlesser, S. ; Schmid, P. ; Strauch, T.FZJ* ; Theisen, M. ; Trassinelli, M. ; Veloso, J. F. C. A. ; Zmeskal, J. ; Gruber, A. ; Simons, L. M. ; dos Santos, J. M. F. ; Liu, Y.-W.

2022
EDP Sciences Les Ulis

International Conference on Exotic Atoms and Related Topics, EXA2021, Vienna, Austria, 13 Sep 2021 - 17 Sep 2021 The European physical journal / Web of Conferences 262, 01005 - (2022) [10.1051/epjconf/202226201005]

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Please use a persistent id in citations: http://hdl.handle.net/2128/33569 doi:10.1051/epjconf/202226201005

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.

Keyword(s): Nuclei and Particles (1st) ; Nuclear Physics (2nd)

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