gamma p --> K+ pi+ Sigma- 산란 반응에서의 Lambda (1405) 광생성

Abstract

In this work, we perform a toy-model analysis for the unpolarized photoproduction of Lambda 1405 by employing the effective Lagrangian approach.We consider that Lambda 1405 consists of high- and low-mass poles as suggested by the chiral unitary model (ChUM). We determine all the model parameters for the phenomenological strong form factors by using the theoretical information from ChUM and experimental data. From the numerical calculations, we observe that the interference between the two poles turns out to be destructive, resulting the single-peak line at 1405 MeV in the invariant mass distribution. From this observation, we conclude that the interference patterns for the two poles should follow those suggested by ChUM.