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@ARTICLE{Rendon:889854,
      author       = {Rendon, Gumaro and Leskovec, Luka and Meinel, Stefan and
                      Negele, John and Paul, Srijit and Petschlies, Marcus and
                      Pochinsky, Andrew and Silvi, Giorgio and Syritsyn, Sergey},
      title        = {{I} = 1 / 2 {S} -wave and {P} -wave {K}π scattering and
                      the κ and {K}* resonances from lattice {QCD}},
      journal      = {Physical review / D},
      volume       = {102},
      number       = {11},
      issn         = {2470-0010},
      address      = {Melville, NY},
      publisher    = {Inst.812068},
      reportid     = {FZJ-2021-00462},
      pages        = {114520},
      year         = {2020},
      abstract     = {We present a lattice-QCD determination of the elastic
                      isospin-$1/2$ $S$-wave and $P$-wave $K{\pi}$ scattering
                      amplitudes as a function of the center-of-mass energy using
                      L\"uscher\'s method. We perform global fits of
                      $K$-matrix parametrizations to the finite-volume energy
                      spectra for all irreducible representations with total
                      momenta up to $\sqrt{3}\frac{2{\pi}}{L}$; this includes
                      irreducible representations (irreps) that mix the $S$- and
                      $P$-waves. Several different parametrizations for the energy
                      dependence of the $K$-matrix are considered. We also
                      determine the positions of the nearest poles in the
                      scattering amplitudes, which correspond to the broad
                      ${\kappa}$ resonance in the $S$-wave and the narrow
                      ${K}^{*}(892)$ resonance in the $P$-wave. Our calculations
                      are performed with $2+1$ dynamical clover fermions for two
                      different pion masses of 317.2(2.2) and 175.9(1.8) MeV. Our
                      preferred $S$-wave parametrization is based on a conformal
                      map and includes an Adler zero; for the $P$-wave, we use a
                      standard pole parametrization including Blatt-Weisskopf
                      barrier factors. The $S$-wave ${\kappa}$-resonance pole
                      positions are found to be $[0.86(12){-}0.309(50)i]\text{
                      }\text{ }\mathrm{GeV}$ at the heavier pion mass and
                      $[0.499(55){-}0.379(66)i]\text{ }\text{ }\mathrm{GeV}$ at
                      the lighter pion mass. The $P$-wave ${K}^{*}$-resonance pole
                      positions are found to be $[0.8951(64){-}0.00250(21)i]\text{
                      }\text{ }\mathrm{GeV}$ at the heavier pion mass and
                      $[0.8718(82){-}0.0130(11)i]\text{ }\text{ }\mathrm{GeV}$ at
                      the lighter pion mass, which corresponds to couplings of
                      ${g}_{{K}^{*}K{\pi}}=5.02(26)$ and
                      ${g}_{{K}^{*}K{\pi}}=4.99(22)$, respectively.},
      cin          = {JSC},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JSC-20090406},
      pnm          = {511 - Computational Science and Mathematical Methods
                      (POF3-511)},
      pid          = {G:(DE-HGF)POF3-511},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000602847800003},
      doi          = {10.1103/PhysRevD.102.114520},
      url          = {https://juser.fz-juelich.de/record/889854},
}