Lambda(1405,1/2^-) photoproduction from the gamma p -> K^+ Lambda(1405) reaction
High Energy Physics - Phenomenology
2011-07-01 v2 Nuclear Theory
Abstract
We investigate the photoproduction of Lambda(1405,1/2^-) = Lambda* off the proton target using the effective Lagrangian in the Born approximation. We observed that, depending on the choice of the K* N Lambda* coupling strength, the total cross section becomes 0.1 <~ sigma_Lambda* <~ 0.2 mu b near the threshold and starts to decrease beyond E_gamma ~ 1.6 GeV, and the angular dependence shows a mild enhancement in the forward direction. It turns out that the energy dependence of the total cross section is similar to that shown in the recent LEPS experiment. This suggests that the production mechanism of the Lambda* is dominated by the s-channel contribution.
Keywords
Cite
@article{arxiv.0806.4029,
title = {Lambda(1405,1/2^-) photoproduction from the gamma p -> K^+ Lambda(1405) reaction},
author = {Seung-il Nam and Ji-Hyoung Park and Atsushi Hosaka and Hyun-Chul Kim},
journal= {arXiv preprint arXiv:0806.4029},
year = {2011}
}
Comments
12 pages, 11 figures