% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Matuschek:891423,
      author       = {Matuschek, Inka and Baru, Vadim and Guo, Feng-Kun and
                      Hanhart, Christoph},
      title        = {{O}n the nature of near-threshold bound and virtual states},
      journal      = {The European physical journal / A},
      volume       = {57},
      number       = {3},
      issn         = {1434-601X},
      address      = {Heidelberg},
      publisher    = {Springer},
      reportid     = {FZJ-2021-01508},
      pages        = {101},
      year         = {2021},
      abstract     = {Physical states are characterised uniquely by their pole
                      positions and the corresponding residues. Accordingly, in
                      those parameters also the nature of the states should be
                      encoded. For bound states (poles on the real s-axis below
                      the lowest threshold on the physical sheet) there is an
                      established criterion formulated originally by Weinberg in
                      the 1960s, which allows one to estimate the amount of
                      compact and molecular components in a given state. We
                      demonstrate in this paper that this criterion can be
                      straightforwardly extended to shallow virtual states (poles
                      on the real s-axis below the lowest threshold on the
                      unphysical sheet) which should be classified as molecular.
                      We argue that predominantly non-molecular or compact states
                      exist either as bound states or as resonances (poles on the
                      unphysical sheet off the real energy axis) but not as
                      virtual states. We also discuss the limitations of the
                      mentioned classification scheme.},
      cin          = {IAS-4 / IKP-3},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-4-20090406 / I:(DE-Juel1)IKP-3-20111104},
      pnm          = {511 - Enabling Computational- Data-Intensive Science and
                      Engineering (POF4-511) / DFG project 196253076 - TRR 110:
                      Symmetrien und Strukturbildung in der Quantenchromodynamik
                      (196253076)},
      pid          = {G:(DE-HGF)POF4-511 / G:(GEPRIS)196253076},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000631879900003},
      doi          = {10.1140/epja/s10050-021-00413-y},
      url          = {https://juser.fz-juelich.de/record/891423},
}