STI Publications - View Publication Form #15882
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Publication Information
| Title | The quark-mass dependence of elastic K\pi scattering from QCD | ||||
| Abstract | We present a determination of the isospin-$\frac{1}{2}$ elastic $\pi K$ scattering amplitudes in $S$ and $P$ partial waves using lattice Quantum Chromodynamics. The amplitudes, constrained for a large number of real-valued energy points, are obtained as a function of light-quark mass, corresponding to four pion masses between 200 and 400 MeV. Below the first inelastic threshold, the $P$-wave scattering amplitude is dominated by a single pole singularity that evolves from being a stable bound-state at the highest quark mass into a narrow resonance that broadens as the pion and kaon masses are reduced. As in experiment, the $S$-wave amplitude does not exhibit an obviously resonant behavior, but instead shows a slow rise from threshold, which is not inconsistent with the presence of a $\kappa$/$K_0^\star(700)$-like resonance at the considered quark masses. As has been found in analyses of experimental scattering data, simple analytic continuations into the complex energy plane of precisel | ||||
| Author(s) | David Wilson, Raul Briceno, Jozef Dudek, Robert Edwards, Christopher Thomas | ||||
| Publication Date | July 2019 | ||||
| Document Type | Journal Article | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Theory & Comp Physics / THEORY CENTER / THEORY CENTER | ||||
| Funding Source | Nuclear Physics (NP), Royal Society–Science Foundation Ireland | ||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | No | ||||
| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Journal Article
| Journal Name | Physical Review Letters |
| Refereed | Yes |
| Volume | 123 |
| Issue | |
| Page(s) | 042002 |
Attachments/Datasets/DOI Link
| Document(s) |
draft6.pdf
(STI Document)
PhysRevLett.123.042002.pdf
(Accepted Manuscript)
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| DOI Link | |
| Dataset(s) | (none) |
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