Authors: Hyun-Chul Kim, Tim Ledwig, S.i. Nam, Klaus Goeke
Title: Structure of the baryon antidecuplet
Keywords: baryon antidecuplet, transition form factors
Abstract:
We present recent investigations on the vector and axial-vector transitions of the baryon antidecuplet within the framework of the self-consistent SU(3) chiral quark-soliton model. Taking into account the 1/N_c rotational and linear m_s corrections. The main contribution to the electric-like transition form factor comes from the wave-function corrections, which is a consequence of the generalized Ademollo-Gatto theorem derived in the present work. It is also found that in general the leading-order contributions are generally almost canceled by the rotational 1/N_c corrections. The results are summarized as follows: the K^* vector and tensor coupling constants for the Theta^+: $g_{K^{*}N\Theta}=0.74 - 0.87$ and $f_{K^{*}N\Theta}=0.53 - 1.16$, and Gamma(Theta -> NK)=0.71, MeV, based on the result of the axial-vector transition constant g_A^* (Theta -> NK)=0.05. We also show the differential cross sections and beam asymmetries, based on the present results. |