Structure of Lambda(1405) and threshold behavior of piSigma scattering

Abstract

The scattering length and effective range of the piSigma channel are studied in order to characterize the strangeness S=-1 meson-baryon scattering and the Lambda(1405) resonance. We examine various off-shell dependence of the amplitude in dynamical chiral models to evaluate the threshold quantities with the constraint at the KbarN threshold. We find that the piSigma threshold parameters are important to the structure of the Lambda(1405) resonance and provide further constraints on the subthreshold extrapolation of the KbarN interaction.

20 pages, 4 figures, with corrections made after referring process

Cited by in corpus (29)

• The nature of the Lambda(1405) resonance in chiral dynamics
• Compositeness of dynamically generated states in a chiral unitary approach
• Structure and compositeness of hadron resonances
• Antikaon-nucleon interaction and Lambda(1405) in chiral SU(3) dynamics
• Structure of Near-Threshold s-Wave Resonances
• Dynamical coupled-channels model of $K^{-}p$ reactions (I): Determination of partial-wave amplitudes
• Dynamical coupled-channels model of $K^{-}p$ reactions (II): Extraction of ${\Lambda }^{\ast }$ and ${\Sigma }^{\ast }$ hyperon resonances
• In medium eta' mass and eta' N interaction based on chiral effective theory
• Precise calculation of the two-step process for K- d -> pi Sigma N in the Lambda (1405) resonance region
• Resonance on top of thresholds: the ${\Lambda }_c(2595{)}^{+}$ as an extremely fine-tuned state
• A unified description of the hidden-charm tetraquark states $Z_{cs}(3985)$, $Z_c(3900)$ and $X(4020)$
• Valence quark and meson cloud contributions for the gamma* Lambda -> Lambda* and gamma* Sigma0 -> Lambda* reactions
• The Lambda* N interaction and two-body bound state based on chiral dynamics
• Classifying Pole of Amplitude Using Deep Neural Network
• Determination of the pi Sigma scattering lengths from the weak decays of Lambda_c
• Comprehensive application of a coupled-channel complex scaling method to the KbarN-piY system
• The role of the triangle singularity in $\Lambda (1405)$ production in the ${\pi }^{-}p\to K^0\pi \Sigma$ and $pp\to p{K}^{+}\pi \Sigma$ processes
• Toward establishing low-lying $\Lambda$ and $\Sigma$ hyperon resonances with the $\bar{K}+d\to \pi +Y+N$ reaction
• $\omega N$ scattering length from $\omega$ photoproduction on the proton near the threshold
• Double-pole nature of $\Lambda (1405)$ studied with coupled-channel complex scaling method using complex-range Gaussian basis
• Production of Sigma{\pm}pi?pK+ in p+p reactions at 3.5 GeV beam energy
• Low-energy $\eta$-nucleon interaction studied with $\eta$ photoproduction off the deuteron
• Recent developments in antikaon-nucleon dynamics
• Double-strangeness exchange reactions in a hybrid Regge-plus-resonance approach
• Coupled-channel ${\Lambda }_c{K}^{+}-p{D}_s$ Interaction in Flavor $\text{SU}\left(3\right)$ Limit of Lattice QCD
• Investigation of the $X(4020)$ peak in the $D^{\ast }{\bar{D}}^{\ast }$ and $\pi h_c$ channels
• Antikaon-nucleon dynamics and its application to few-body systems
• Learning Pole Structures of Hadronic States using Predictive Uncertainty Estimation
• Establishing mass spectrum of $S=-1$ hyperon resonances via a dynamical coupled-channels analysis of $K^{-}p$ reactions