Model-Independent Extraction of the N*(1535) Electrostrong Form Factor from Eta Electroproduction

Abstract

We analyze the existing data on electroproduction of eta mesons in the region of W~1.5GeV, and extract an electrostrong form factor for the N*(1535) electroexcitation and decay into the eta-N channel, which is found to be relatively insensitive to the uncertainties of the effective Lagrangian approach. this extracted quantity is of interest in the QCD description of relevant baryons.

Comments: 12 pages, two figures; to be published in Phys. Rev. Lett