Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2010-12-15
Phys.Rev.C83:055202,2011
Physics
Nuclear Physics
Nuclear Theory
31 pages, 25 figures
Scientific paper
10.1103/PhysRevC.83.055202
The internal structure of the resonant Lambda(1405) state is investigated based on meson-baryon coupled-channels chiral dynamics, by evaluating density distributions obtained from the form factors of the Lambda(1405) state. The form factors are defined as an extension of the ordinary stable particles and are directly evaluated from the meson-baryon scattering amplitude, paying attention to the charge conservation of the probe interaction. For the resonant Lambda(1405) state we calculate the density distributions in two ways. One is on the pole position of the Lambda(1405) in the complex energy plane, which evaluates the resonant Lambda(1405) structure without contamination from nonresonant backgrounds, and another on the real energy axis around the Lambda(1405) resonance energy, which may be achieved in experiments. Using sereval probe interactions and channel decomposition, we separate the various contributions to the internal structure of the Lambda(1405). As a result, we find that the resonant Lambda(1405) state is composed of widely spread Kbar around N, which gives dominant component inside the Lambda(1405), with escaping pi Sigma component. Furthermore, we consider Kbar N bound state without decay channels, with which we can observe the internal structure of the bound state within real numbers. We also study the dependence of the form factors on the binding energy and meson mass. This verifies that the form factor defined through the scattering amplitude serves as a natural generalization of the form factor for the resonance state. The relation between the interaction strength and the meson mass shows that the physical kaon mass appears to be within the suitable range to form a molecular bound state with the nucleon through the chiral SU(3) interaction.
Hyodo Tetsuo
Jido Daisuke
Sekihara Takayasu
No associations
LandOfFree
Internal structure of resonant Lambda(1405) state in chiral dynamics does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Internal structure of resonant Lambda(1405) state in chiral dynamics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Internal structure of resonant Lambda(1405) state in chiral dynamics will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-13327