001     889854
005     20230217124238.0
024 7 _ |a 10.1103/PhysRevD.102.114520
|2 doi
024 7 _ |a 0556-2821
|2 ISSN
024 7 _ |a 1089-4918
|2 ISSN
024 7 _ |a 1538-4500
|2 ISSN
024 7 _ |a 1550-2368
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024 7 _ |a 1550-7998
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024 7 _ |a 2470-0010
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024 7 _ |a 2470-0029
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024 7 _ |a 2128/26872
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024 7 _ |a altmetric:96784280
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024 7 _ |a WOS:000602847800003
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037 _ _ |a FZJ-2021-00462
082 _ _ |a 530
100 1 _ |a Rendon, Gumaro
|0 0000-0002-6807-6760
|b 0
|e Corresponding author
245 _ _ |a I = 1 / 2 S -wave and P -wave Kπ scattering and the κ and K* resonances from lattice QCD
260 _ _ |a Melville, NY
|c 2020
|b Inst.812068
264 _ 1 |3 online
|2 Crossref
|b American Physical Society (APS)
|c 2020-12-28
264 _ 1 |3 print
|2 Crossref
|b American Physical Society (APS)
|c 2020-12-01
336 7 _ |a article
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336 7 _ |a Journal Article
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336 7 _ |a ARTICLE
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336 7 _ |a Journal Article
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520 _ _ |a 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.
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700 1 _ |a Leskovec, Luka
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700 1 _ |a Meinel, Stefan
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700 1 _ |a Negele, John
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700 1 _ |a Paul, Srijit
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700 1 _ |a Petschlies, Marcus
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700 1 _ |a Pochinsky, Andrew
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700 1 _ |a Silvi, Giorgio
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700 1 _ |a Syritsyn, Sergey
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773 1 8 |a 10.1103/physrevd.102.114520
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|v 102
|y 2020
|x 2470-0010
773 _ _ |a 10.1103/PhysRevD.102.114520
|g Vol. 102, no. 11, p. 114520
|0 PERI:(DE-600)2844732-3
|n 11
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|t Physical review / D
|v 102
|y 2020
|x 2470-0010
856 4 _ |u https://juser.fz-juelich.de/record/889854/files/PhysRevD.102.114520.pdf
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