Helicity Amplitudes of the Lambda(1670) and two Lambda(1405) as dynamically generated resonances

Understand

We determine the helicity amplitudes A_1/2 and radiative decay widths in the transition Lambda(1670) to gamma Y (Y=Lambda or Sigma^0).

• The Lambda(1670) is treated as a dynamically generated resonance in meson-baryon chiral dynamics.
• We obtain the radiative decay widths of the Lambda(1670) to gamma Lambda as 3 \pm 2 keV and to gamma Sigma^0 as 120 \pm 50 keV.
• Also, the Q^2 dependence of the helicity amplitudes A_1/2 is calculated.