A relativistic constituent quark model is found to reproduce the recent data
regarding the ratio of proton form factors, F2(Q2)/F1(Q2). We show that
imposing Poincare invariance leads to substantial violation of the helicity
conservation rule, as well as an analytic result that the ratio
F2(Q2)/F1(Q2)∼1/Q for intermediate values of Q2.Comment: 13 pages, 7 figures, to be submitted to Phys. Rev. C typos corrected,
references added, 1 new figure to show very high Q^2 behavio