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@ARTICLE{vonDetten:892607,
      author       = {von Detten, L. and Noël, F. and Hanhart, Christoph and
                      Hoferichter, M. and Kubis, B.},
      title        = {{O}n the scalar ${\pi {K}}$ form factor beyond the elastic
                      region},
      journal      = {The European physical journal / C},
      volume       = {81},
      number       = {5},
      issn         = {1434-6052},
      address      = {Heidelberg},
      publisher    = {Springer},
      reportid     = {FZJ-2021-02196},
      pages        = {420},
      year         = {2021},
      abstract     = {Pion–kaon (πK) pairs occur frequently as final states in
                      heavy-particle decays. A consistent treatment of πK
                      scattering and production amplitudes over a wide energy
                      range is therefore mandatory for multiple applications: in
                      Standard Model tests; to describe crossed channels in the
                      quest for exotic hadronic states; and for an improved
                      spectroscopy of excited kaon resonances. In the elastic
                      region, the phase shifts of πK scattering in a given
                      partial wave are related to the phases of the respective πK
                      form factors by Watson’s theorem. Going beyond that, we
                      here construct a representation of the scalar πK form
                      factor that includes inelastic effects via resonance
                      exchange, while fulfilling all constraints from πK
                      scattering and maintaining the correct analytic structure.
                      As a first application, we consider the decay τ→KSπντ,
                      in particular, we study to which extent the S-wave
                      K∗0(1430) and the P-wave K∗(1410) resonances can be
                      differentiated and provide an improved estimate of the CP
                      asymmetry produced by a tensor operator.},
      cin          = {IAS-4 / IKP-3},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-4-20090406 / I:(DE-Juel1)IKP-3-20111104},
      pnm          = {111 - Energiesystemtransformation (POF4-111) / DFG project
                      196253076 - TRR 110: Symmetrien und Strukturbildung in der
                      Quantenchromodynamik (196253076)},
      pid          = {G:(DE-HGF)POF4-111 / G:(GEPRIS)196253076},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000650628100001},
      doi          = {10.1140/epjc/s10052-021-09169-7},
      url          = {https://juser.fz-juelich.de/record/892607},
}