1209.4138 (Jun He et al.)

The roles of nucleon resonances in $Λ$(1520) photoproduciton off
proton    [PDF]

Jun He, Xu-Rong Chen

In this work the roles of the nucleon resonances in the $\Lambda$(1520) photoproduction off proton target are investigated within the effective Lagrangian method. Besides the Born terms,including contact term, $s$-, $u$- and $K$ exchanged $t$-channels, vector meson $K^*$ exchanged $t-$channel is considered in our investigation, which is negligible at low energy and important at high energy. The important nucleon resonances predicted by the constituent quark model (CQM) are considered and the results are found well comparable with the experimental data. Besides the dominant $D_{13}(2080)$, the resonance $[\textstyle{5\over 2}^-]_2(2080)$ predicted by the CQM is found important to reproduce the experimental data. Other nucleon resonances are found to give small contributions in the channel considered in this work. With all important nucleon resonances predicted by CQM, the prediction of the differential cross section at the energy up to 5.5 GeV are presented also, which can be checked by the future CLAS experimental data.

View original: http://arxiv.org/abs/1209.4138