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@ARTICLE{Strauch:18235,
      author       = {Strauch, Th. and Amaro, F.D. and Anagnostopoulos, D.F. and
                      Bühler, P. and Covita, D.S. and Gorke, H. and Gotta, D. and
                      Gruber, A. and Hirtl, A. and Indelicato, P. and Le Bigot,
                      E-O. and Nekipelov, M. and dos Santos, J.M.F. and Schmid,
                      Ph. and Schlesser, S. and Simons, L.M. and Trassinelli, M.
                      and Veloso, J.F.C.A. and Zmeskal, J.},
      title        = {{P}ionic deuterium},
      journal      = {The European physical journal / A},
      volume       = {47},
      issn         = {1434-6001},
      address      = {Berlin},
      publisher    = {Springer},
      reportid     = {PreJuSER-18235},
      pages        = {88},
      year         = {2011},
      note         = {We would like to thank N. Dolfus, B. Leoni, L. Stohwasser,
                      and K.-P. Wieder for the technical assistance and V. Baru,
                      C. Hanhart, A. Nogga, M. Hoferichter, and A. Rusetsky for
                      continuous exchange of information on theoretical progress
                      on the pi D system. The Bragg crystal was manufactured by
                      Carl Zeiss AG, Oberkochen, Germany. Partial funding and
                      travel support was granted by FCT (Lisbon) and FEDER (Grant
                      No. SFRH/BD/18979/2004 and project PTDC/FIS/102110/2008) and
                      the Germaine de Stael exchange program. LKB is Unite Mixte
                      de Recherche du CNRS, de l'Ecole Normale Superieure et de
                      UPMC No. 8552. This work is part of the PhD thesis of one of
                      us (Th. S., University of Cologne, 2009).},
      abstract     = {The strong-interaction shift epsilon(pi D)(1s) and
                      broadening Gamma(pi D)(1s) in pionic deuterium have been
                      determined in a high statistics study of the pi D(3p-1s)
                      X-ray transition using a high-resolution crystal
                      spectrometer. The pionic deuterium shift will provide
                      constraints for the pion-nucleon isospin scattering lengths
                      extracted from measurements of shift and broadening in
                      pionic hydrogen. The hadronic broadening is related to pion
                      absorption and production at threshold. The results are
                      epsilon(pi D)(1s) = (-2356 +/- 31) meV (repulsive) and
                      Gamma(pi D)(1s) = (1171(-49)(+23)) meV yielding for the
                      complex pi D scattering length apD = [-(24.99 +/- 0.33)+
                      i(6.22(-0.26)(+0.1)2)] x 10(-3) m(pi)(-1). From the
                      imaginary part, the threshold parameter for pion production
                      is obtained to be alpha = (251(-11)(+5))mu b. This allows,
                      in addition, and by using results from pion absorption in
                      He-3 at threshold, the determination of the effective
                      couplings g(0) and g(1) for s-wave pion absorption on
                      isoscalar and isovector NN pairs.},
      keywords     = {deuterium: mesic atom (INSPIRE) / pi: mesic atom (INSPIRE)
                      / scattering: (pi deuterium) (INSPIRE) / pi: absorption
                      (INSPIRE) / pi: production (INSPIRE) / spectrometer: crystal
                      (INSPIRE) / broadening (INSPIRE) / scattering length
                      (INSPIRE)},
      cin          = {IKP-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IKP-2-20111104},
      pnm          = {Physik der Hadronen und Kerne},
      pid          = {G:(DE-Juel1)FUEK413},
      shelfmark    = {Physics, Nuclear / Physics, Particles $\&$ Fields /
                      36.10.Gv / 25.80.Ls / 07.85.Nc},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000293634100001},
      eprint       = {1011.2415},
      howpublished = {arXiv:1011.2415},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:1011.2415;\%\%$},
      doi          = {10.1140/epja/i2011-11088-1},
      url          = {https://juser.fz-juelich.de/record/18235},
}