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Chiral SU(3) theory of antikaon-nucleon interactions with improved threshold constraints

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arxiv 1201.6549 v1 pith:BEP7AIMX submitted 2012-01-31 nucl-th hep-ph

classification nucl-thhep-ph
keywords interactionschiralcoupled-channelsmeson-baryonamplitudesconstraintseffectiveframework
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

$\bar{K}$-nucleon interactions are investigated in the framework of coupled-channels dynamics based on the next-to-leading order chiral SU(3) meson-baryon effective Lagrangian. A recent determination of the 1s shift and width of kaonic hydrogen enables us to set accurate constraints on the coupled-channels meson-baryon amplitudes in the strangeness $S=-1$ sector. Theoretical uncertainties in the subthreshold extrapolation of the coupled-channels amplitudes are discussed. Using this framework, we give predictions for $K^-$-neutron interactions and for the spectrum of the $\Lambda(1405)$ resonance. A simplified, effective three-channel model using leading order chiral SU(3) meson-baryon interactions is also constructed for convenient application in $\bar{K}$-nuclear few-body calculations.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Universal parameters of the $\Lambda(1380)$, the $\Lambda(1405)$ and their isospin partners from a combined analysis of Lattice QCD and experimental results

    hep-ph 2025-07 conditional novelty 6.0 of 10

    A combined global fit of lattice QCD spectra and experimental Kbar N data within chiral unitary approaches gives pole positions for the Lambda(1380) and Lambda(1405) at physical and lattice quark masses, with systemat...

  2. Spectroscopic and femtoscopic insights into vector-baryon interactions in the strangeness $-1$ sector

    hep-ph 2025-07 conditional novelty 6.0 of 10

    The authors predict three Lambda* and two Sigma* resonances from vector-baryon interactions and provide femtoscopy correlation functions for six channels in the S=-1 sector.

  3. High-precision measurement of the kaonic hydrogen 1s level shift and width with SIDDHARTA-2

    nucl-ex 2026-07 conditional novelty 5.0 of 10

    A new kaonic-hydrogen X-ray measurement yields the most precise values of the strong-interaction 1s level shift and width, improving on SIDDHARTA by roughly a factor of two.

  4. Vector charmonium(-like) states in the energy range of 4.1-4.6 GeV

    hep-ph 2026-06 unverdicted novelty 5.0 of 10

    A coupled-channel framework is developed and fitted to BESIII data on vector charmonium-like states in the 4.1-4.6 GeV range, concluding that coupled-channel effects with dynamically generated poles explain the line shapes.

  5. Finding Low Star Discrepancy 3D Kronecker Point Sets Using Algorithm Configuration Techniques

    cs.NE 2026-04 unverdicted novelty 5.0 of 10

    Optimizing the two Kronecker parameters with irace yields new state-of-the-art L∞ star discrepancy for 3D point sets of size at least 500 and for ranges of sizes.

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