Phenomenological Study On The Photoproduction Of φ(2170)

In recent years,a large number of hadron states have been found experimentally.However,the nature of many hadron resonances is still unclear.There are still many different explanations in theory.In order to further understand the properties of these resonance states,it is necessary to study the possible generation processes of these resonance states theoretically,and give the predictions for the experimentally searching for them.0(2170)is a resonance state discovered by the Babar Collaboration in 2006.It has been measured by several collaborations including Belle,BESII and BESIII for more than ten years,but the results are not consistent.At the same time,there are many explanations for its nature in theory,such as:strangeonium state,hybrid state,three-body molecular state,tetraquark state,etc.,but we can not distinguish these explanations based on the existing experimental data.In the γp-KKp process of the FNAL Collaboration,the bump structure of KK at 2150 MeV indicates thatφ(2170)may be generated in γp.Based on the strong coupling between 0(2170)and ηφ,we study the γp→φθp process.In this work,we studied the γp→φηp process within the effective Lagrangian approach,by considering the contribution of the intermediate states φ(2170),N and N(1535),in which the photon and proton interact through the t-channel πand η meson exchanges.Our calculation results show that the ηφ mass distribution of γp→φηp pprocess may have a peak around 2180 MeV,and at least one bump structure.We suggest that the experimental colleagues to search for 0(2170)in γp→φηp reaction.