0 2 4 6 8 d σ$^{L}$ /dt [ b/GeV 2 ] JLAB 0 1 2 3 4 JLAB 0 1 2 3 JLAB 0 1 JLAB 0 2 4 6 d T  /dt [ b/GeV 2 ] 0 2 4 0 2 4 0 1 2 -1 0 d TT  /dt [ b/GeV 2 ] -1 0 -1 0 -1 0 0.1 0.2 -t [GeV$^{2}$] -1 0 1 d LT  /dt [ b/GeV 2 ] 0.1 0.2 0.3 -t [GeV$^{2}$] -1 0 1 0.1 0.2 0.3 0.4 -t [GeV$^{2}$] -1 0 1 0.4 0.6 0.8 -t [GeV$^{2}$] -1 0 1 Q$^{2 }$= 1.60 GeV 2 Q$^{2 }$= 2.45 GeV 2 Q$^{2 }$= 2.15 GeV 2 Q$^{2 }$= 3.91 GeV 2 W = 2.20 GeV W = 2.20 GeV W = 2.21 GeV W = 2.25 GeV FIG. 6: (Color online) − t dependence of l/t partial transverse dσ$_{T}$/dt , longitudinal dσ$_{L}$/dt and interference dσ$_{TT}$/dt and dσ$_{LT}$/dt differential cross sections in exclusive reaction p ( γ $^{∗}$, π $^{+}$) n . The experimental data are from the F π -2 [1] and π -CT [3] experiments at JLAB. The numbers displayed in the plots are the average ( Q $^{2}$, W ) values. The dashed curves correspond to the exchange of the π -Regge trajectory alone. The dash-dotted curves are obtained with the on-mass-shell form factors in the nucleon-pole contribution and exchange of the ρ (770) /a$_{2}$ (1320)-trajectory. The solid curves describe the model results with the resonance contributions. The data points in each ( Q $^{2}$, W ) bin correspond to slightly different values of Q 2 and W for the various − t bins. The calculations are performed for values of Q 2 and W corresponding to the first − t bin. The histograms for dσ$_{T}$/dt are the results from [25]. 12