ИСТИНА

The first results on studies of the ep → e′ p′ π + π − reaction at W from 1.4 to 1.8 GeV and Q2 from 0.4 to 1.1 GeV2 with the CLAS detector will be presented. Nine one-fold differential cross sections will become available in this kinematical area and within of photon virtuality (Q2 ) bins of smallest sizes ever achieved in studies of this exclusive channel (50 MeV2 ). Analysis of this data within a reaction model [1, 2] will improve considerably the avaliable Q2 evolution of the γv N N ∗ electrocouplings of excited proton states in the mass range up to 1.8 GeV. Furthermore, this information is of particular importance for the studies of 3/2+ (1720) candidate state [3]. [1] V.I. Mokeev et al. (CLAS Collaboration), “Experimental Study of the P11 (1440) and D13 (1520) reso- nances from CLAS data on ep → e′ π + π − p′ ,” Phys.Rev. C86, 035203 (2012), arXiv:1205.3948 [nucl-ex] [2] Viktor I. Mokeev, Volker D. Burkert, Tsung-Shung H. Lee, Latifa Elouadrhiri, Gleb V. Fedotov, et al., “Model Analysis of the pπ + π − Electroproduction Reaction on the Proton,” Phys.Rev. C80, 045212 (2009), arXiv:0809.4158 [hep-ph] [3] M. Ripani et al. (CLAS Collaboration), “Measurement of ep → e′ pπ + π − and baryon resonance analysis,” Phys.Rev.Lett. 91, 022002 (2003), arXiv:hep-ex/0210054 [hep-ex]