Nuclear Theory · arXiv:0710.5925 v1 · submitted 31 Oct 2007
The nature of the Lambda(1405)
The paper says
“We present here some results supporting the nature of the Λ(1405) resonance as dynamically generated from the meson baryon interaction in coupled channels and resulting from the superposition of two close-by poles.”
from the abstract · picked out as the main claim by a classifier
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The paper
Abstract
We present here some results supporting the nature of the Λ(1405) resonance as dynamically generated from the meson baryon interaction in coupled channels and resulting from the superposition of two close-by poles. We find support for this picture in the K−p → π0π0Σ0 reaction, which shows a different shape than the one obtained from the π−p → K0πΣ reaction. We also call the attention to the K−p → γπΣ with πΣ in the Λ(1405) region, which shows a narrow peak in the calculations around 1420 MeV. We also report on recent calculations of the radiative decay of the two Λ(1405) states and on reactions to obtain information on these decay modes. Finally, we present results for the pp → pK+Λ(1405) reaction recently measured at ANKE/COSY and compare them with theoretical results.
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abstract compiled · 2026-09-23 · no language-model review
How the main claim is stated: asserted 0.61
What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.08 · human participants 0.02 · controlled comparison 0.11 · randomized assignment 0.01 · states quantitative result 0.84 · compares with prior results 0.77 · mentions code or data availability 0.02
The abstract, sentence by sentence
This table labels the abstract only (arXiv listing abstract v1). The number is the probability the classifier gave the label.
| Sentence | Role | The authors' own work | States the main conclusion | Strength |
|---|---|---|---|---|
| We present here some results supporting the nature of the $\Lambda(1405)$ resonance as dynamically generated from the meson baryon interaction in coupled channels and resulting from the superposition of two close-by poles. | contribution 0.52 | 0.69 | 0.94 | asserted 0.61 |
| We find support for this picture in the $K^- p \to \pi^0 \pi^0 \Sigma^0 $ reaction, which shows a different shape than the one obtained from the $\pi ^- p \to K^0 \pi \Sigma $ reaction. | result 0.93 | 0.89 | 0.06 | asserted 0.95 |
| We also call the attention to the $K^- p \to \gamma \pi \Sigma$ with $\pi \Sigma$ in the $\Lambda(1405)$ region, which shows a narrow peak in the calculations around 1420 MeV. | result 0.98 | 0.82 | 0.05 | asserted 0.94 |
| We also report on recent calculations of the radiative decay of the two $\Lambda(1405)$ states and on reactions to obtain information on these decay modes. | contribution 0.96 | 0.84 | 0.03 | asserted 0.87 |
| Finally, we present results for the $pp\to p K^+\Lambda(1405)$ reaction recently measured at ANKE/COSY and compare them with theoretical results. | contribution 0.83 | 0.74 | 0.05 | asserted 0.98 |
What kind of paper the classifier reports this is: theoretical result 0.50 · evidence from simulation or computation 0.97
What was examined, and what was not
Sources read
- arXiv listing abstract v1
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- full text
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- references and citing sentences
- relations to other papers
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- P abstract
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- S sections
- T body sentences
- C citations
- R cross-paper relations
How the labels were made
Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 4,493 input tokens, $0.0002 reported.
Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. This record as JSON
How the literature uses it
1 arXiv paper cite this in 1 sentence
Papers whose main result relates to this one's
States the same result 5 papers
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With this successful description of Lambda(1405), it is found that the Lambda(1405) is composed by two resonance states having different coupling nature to the meson-baryon states.
The nature of Lambda(1405) hyperon resonance in chiral dynamics · 0.92
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We reach the conclusion that the Lambda(1405) resonance seen in experiments is not just one single resonance, but a superposition of these two states.
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We show that the structure of the Lambda(1405) resonance is dominated by the meson-baryon molecule component and is described as a superposition of two independent states.
The nature of the Lambda(1405) resonance in chiral dynamics · 0.89
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The Lambda(1405) emerges as containing the effect of two poles of the scattering amplitude and various reactions that might preferentially select one or the other pole are discussed.
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Studying the analytic structure of the scattering amplitude, we have found that there are two poles lying around energies of Lambda(1405) with different widths and couplings to the meson-baryon states.
States a conflicting result 1 paper
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In sector of strangeness $S=-1$ and isospin $I=0$, only one pole is generated dynamically in the 1400MeV region, which might correspond to the $\Lambda(1405)$ particle.
The pseudoscalar meson and baryon octet interaction in the unitary coupled-channel approximation · 0.92
Papers citing it
Cites it as background 1 paper
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Various other reactions testing the two-pole nature of the $Λ(1405)$ have been presented at this workshop [ref] .
Resonances in chiral unitary approaches · The $Λ(1405)$ and its two-pole nature · 0.87
What it cites · 6 sentences without a confident label
Cites as background 5 papers
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The $Λ(1405)$ resonance has a long history as a dynamically generated resonance from the interaction of meson baryon coupled channels [ref] but its study has become more systematic with the advent of chiral unitary theories [ref] .
SU(6) Extension of the Weinberg-Tomozawa Meson-Baryon Lagrangian · Introduction · 0.92
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The $Λ(1405)$ resonance has a long history as a dynamically generated resonance from the interaction of meson baryon coupled channels [ref] but its study has become more systematic with the advent of chiral unitary theories [ref] .
Chiral Dynamics and the Low Energy Kaon-Nucleon Interaction · Introduction · 0.92
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Recently there have been many works implementing effects of higher order Lagrangians in $K̅N$ and coupled channels [ref] .
K^- p scattering length from scattering experiments · Introduction · 0.95
Challenges and discussion
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