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2024-12-03
15:49
OpenAccess [GSI-2024-01149] Journal Article
; ; ; et al
Lattice QCD study of $\pi$$\Sigma$ − $\bar{K}$$N$ scattering and the $\Lambda(1405)$ resonance
A lattice QCD computation of the coupled channel πΣ–K¯N scattering amplitudes in the Λ(1405) region is detailed. Results are obtained using a single ensemble of gauge field configurations with Nf=2+1 dynamical quark flavors and mπ≈200  MeV and mK≈487  MeV. [...]
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2024-12-03
15:45
OpenAccess [GSI-2024-01147] Journal Article
; ; ; et al
Triangle and box diagrams in coupled-channel systems from the chiral Lagrangian
We perform an analysis of triangle- and box-loop contributions to the generalized potential in the scattering of Goldstone bosons off the 𝐽𝑃 =0− and 1− charmed mesons. Particular emphasis is put on the use of on-shell mass parameters in such contributions in terms of a renormalization scheme that ensures the absence of power-counting violating terms. [...]
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2024-12-03
15:42
OpenAccess [GSI-2024-01146] Journal Article
; ;
QCD in the chiral SU(3) limit from baryon masses on lattice QCD ensembles
The baryon masses on Coordinate Lattice Simulations (CLS) ensembles are used to determine the Low-Energy Constants (LEC) that characterize quantum chromodynamics in the flavor-SU(3) limit with vanishing up, down, and strange quark masses. Here we reevaluate some of the baryon masses on flavor-symmetric ensembles with much-improved statistical precision, in particular for the decuplet states. [...]
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2024-12-03
15:31

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2024-12-03
15:29

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