High Energy Physics - Lattice · arXiv:1512.05831 v2 · submitted 18 Dec 2015
The pole structure of the Lambda(1405) in a recent QCD simulation
The paper says
“The UCHPT calculation predicts the quark mass dependence remarkably well.”
from the abstract · picked out as the main claim by a classifier
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The paper
Abstract
The Λ(1405) baryon is difficult to detect in experiment, absent in many quark model calculations, and supposedly manifested through a two-pole structure. Its uncommon properties made it subject to numerous experimental and theoretical studies in recent years. Lattice-QCD eigenvalues for different quark masses were recently reported by the Adelaide group. We compare these eigenvalues to predictions of a model based on Unitary Chiral Perturbation Theory. The UCHPT calculation predicts the quark mass dependence remarkably well. It also explains the overlap pattern with different meson-baryon components, mainly πΣ and K̄N, at different quark masses. More accurate lattice QCD data are required to draw definite conclusions on the nature of the Λ(1405).
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abstract compiled · 2026-09-23 · no language-model review
How the main claim is stated: asserted 1.00
What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.88 · human participants 0.02 · controlled comparison 0.11 · randomized assignment 0.01 · states quantitative result 0.07 · compares with prior results 0.93 · mentions code or data availability 0.02
The abstract, sentence by sentence
This table labels the abstract only (arXiv listing abstract v2). The number is the probability the classifier gave the label.
| Sentence | Role | The authors' own work | States the main conclusion | Strength |
|---|---|---|---|---|
| The $\Lambda(1405)$ baryon is difficult to detect in experiment, absent in many quark model calculations, and supposedly manifested through a two-pole structure. | background 1.00 | 0.04 | 0.08 | asserted 0.61 |
| Its uncommon properties made it subject to numerous experimental and theoretical studies in recent years. | background 1.00 | 0.05 | 0.02 | asserted 0.99 |
| Lattice-QCD eigenvalues for different quark masses were recently reported by the Adelaide group. | background 0.76 | 0.05 | 0.02 | asserted 1.00 |
| We compare these eigenvalues to predictions of a model based on Unitary Chiral Perturbation Theory. | method 0.69 | 0.84 | 0.04 | asserted 0.83 |
| The UCHPT calculation predicts the quark mass dependence remarkably well. | result 0.99 | 0.44 | 0.32 | asserted 1.00 |
| It also explains the overlap pattern with different meson-baryon components, mainly $\pi\Sigma$ and $\bar KN$, at different quark masses. | result 0.87 | 0.42 | 0.16 | asserted 1.00 |
| More accurate lattice QCD data are required to draw definite conclusions on the nature of the $\Lambda(1405)$. | future work 0.79 | 0.12 | 0.19 | asserted 0.68 |
What kind of paper the classifier reports this is: theoretical result 0.67 · evidence from analysis of existing data 0.76
What was examined, and what was not
Sources read
- arXiv listing abstract v2
Not examined
- full text
- figures and tables
- references and citing sentences
- relations to other papers
Levels run
- 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-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 5,460 input tokens.
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
Cited by 8 Pith papers
Reviewed papers on Pith that cite this one. The full citation record
- 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 · Jul 2025
- Cross-channel constraints on resonant antikaon-nucleon scattering hep-ph · Sep 2022
- Three-body Unitarity in the Finite Volume hep-lat · Sep 2017
- Structure of the Roper Resonance from Lattice QCD Constraints nucl-th · Mar 2017
- Machine learning unveils the quark mass dependence of the pseudoscalar meson decay constants in three-flavour N$^2$LO ChPT hep-ph · Jun 2026
- Two-flavor Simulations of the $\rho(770)$ and the Role of the $K\bar K$ Channel hep-lat · May 2016
- Review of the ${\mathbf \Lambda}$(1405): A curious case of a strange-ness resonance nucl-th · Sep 2020
- QCD and the Strange Baryon Spectrum hep-ph · Oct 2020
How the literature uses it
24 arXiv papers cite this in 34 sentences
Papers citing it · 17 sentences without a confident label
Uses its method or tool 3 papers
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On the other hand, in the finite volume, neglecting the effects from higher partial waves, the scattering amplitude reads, [equation] The finite-volume loop function $G̃$ can be calculated in the DR scheme as [ref] , [equation] being $ΔG = G̃^co - G^co$, and the loop function in the infinite volume, $G^DR$, $G^co$, are evaluated in the dimensional regularization (DR) and cutoff scheme (co), respectively [ref] .
Pole trajectories of the $\Lambda(1405)$ helps establish its dynamical nature · Formalism · 0.99
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Following the procedure of Ref. [ref] , $M_0,P$ and $F_0$ are determined by fitting to the isospin averaged values of the physical meson masses $M_π$, $M_K$ and $M_η$, and the pion decay constant $F_π$.
New insights into the nature of the $\Lambda(1380)$ and $\Lambda(1405)$ resonances away from the SU(3) limit · Parameters and trajectories · 0.98
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To take this effect into account, we follow the Appendix of Ref. [ref] (see also Ref. [ref] ), and the formulas therein, based on chiral perturbation theory.
The negative-parity spin-1/2 $\Lambda$ baryon spectrum from lattice QCD and effective theory · Finite volume CUA with non-physical hadron masses · 1.00
Uses its data or values 1 paper
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The corresponding values for baryon masses, meson masses and decay constants, used as input for the CUA calculation, are given in Table II of Ref. [ref] .
The negative-parity spin-1/2 $\Lambda$ baryon spectrum from lattice QCD and effective theory · Spectrum · 0.99
Cites it as support 1 paper
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Analysis of the lattice QCD (LQCD) data also supports this picture [ref] .
Lowest-lying ${\frac{1}{2}}^-$ and ${\frac{3}{2}}^-$ $\Lambda_{Q}$ resonances: from the strange to the bottom sectors · Unitary chiral perturbation theory and hadroni-molecules · 0.98
Cites it as background 12 papers
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The mass and different decay properties of $Λ(1405)$ were studied using different theoretical methods including lattice QCD [ref] .
Mass and residue of $ \Lambda(1405)$ as hybrid and excited ordinary baryon · Introduction · 0.90
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The first explorations of the trajectories of the $Λ(1405)$ with increasing pion masses can be found in Refs. [ref] .
Pole trajectories of the $\Lambda(1405)$ helps establish its dynamical nature · Introduction · 0.97
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Nowaday this low-energy, $S=-1$ region is accessed by chiral unitary coupled-channel models [ref] , amplitude analyses [ref] , lattice QCD [ref] , and quark models [ref] , see, e.g., the reviews in Refs. [ref] .
S- and p-wave structure of $S=-1$ meson-baryon scattering in the resonance region · Introduction · 0.96
What it cites · 5 sentences without a confident label
Cites as background 1 paper
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After this manuscript appeared on arXiv, the $Λ(1405)$ finite-volume spectrum was analyzed in Ref. [ref] .
Structure of the $\mathbf{\Lambda(1405)}$ from Hamiltonian effective field theory · Introduction · 0.81
Challenges and discussion
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