What We Know About the Lambda(1405)

Abstract

The current status of the Lambda(1405) resonance in the Kbar N scattering is summarized. It is shown that the precise experimental data and the theoretical developments in chiral SU(3) dynamics enable us to quantitatively understand the physics around the Kbar N threshold. We present the recent theoretical predictions of the pi Sigma spectrum and the investigations of the internal structure of the Lambda(1405).

8 pages, 4 figures, Talk given at XVI International Conference on Hadron Spectroscopy (Hadron 2015), Sep. 13-18, 2015, Newport News, VA

References in corpus (18)

• Heavy quarkonium: progress, puzzles, and opportunities
• Chiral effective field theory and nuclear forces
• Effective Kbar N interaction based on chiral SU(3) dynamics
• K^- p scattering length from scattering experiments
• Lattice QCD Evidence that the Lambda(1405) Resonance is an Antikaon-Nucleon Molecule
• Origin of resonances in the chiral unitary approach
• Constraints on the chiral unitary $\bar{K}N$ amplitude from $\pi \Sigma K^{+}$ photoproduction data
• On the Strangeness -1 S-wave Meson-Baryon Scattering
• Measurement of the Sigma pi photoproduction line shapes near the Lambda(1405)
• Comprehensive analysis of the wave function of a hadronic resonance and its compositeness
• New insights into antikaon-nucleon scattering and the structure of the Lambda(1405)
• Photoproduction of Lambda(1405) and Sigma^{0}(1385) on the proton at E_γ= 1.5-2.4 GeV
• Kaonic production of Lambda(1405) off deuteron target in chiral dynamics
• Weak decay of Lambda_c^+ for the study of Lambda(1405) and Lambda(1670)
• Structure of Lambda(1405) and construction of KbarN local potential based on chiral SU(3) dynamics
• On the nature of the $\Lambda (1405)$ and $\Lambda (1670)$ from their $N_c$ behavior in chiral dynamics
• Hadron mass scaling near the s-wave threshold
• Structure of the Lambda(1405) baryon resonance from its large Nc behavior