Pion-induced K^* production with Σ^* baryon off proton target

In this work,the reactionπ-p→K^*Σ^*is investigated with an effective Lagrangian approach.The contributions from the Born terms,including the s,t,and u channel,are considered,and the Regge model and the Feynman model are applied to treat the t-channel contribution.The existing experimental data can be reproduced with the best-fittedχ^2 being 2.38 and 1.54 for the Feynman and Regge models,respectively.Moreover,it is found that the contribution from the t channel is dominant in the cross-section.The contribution of the u channel is mainly distributed at backward angles,and the contribution from the s channel is small and negligible.In the Feynman model,the contribution of the t-channel K exchange is much larger than the contribution of the K^*exchange,while in the Regge model the contribution of the t-channel K exchange is comparable to that of the K^*exchange.Prediction about the differential crosssection of theπ-p→K^*Σ^*reaction is also presented,which is helpful for clarifying the role of the Regge treatment.The current results suggest high-precision experimental measurements which can be performed at J-PARC and COMPASS.