Measurement of New Observables from the π+π- ρ Electroproduction Off the Proton

A key objective of the N* program is to measure the resonance transition form factors that contain information needed to explore the distance-dependence description of the interaction of a probe with the nucleon resulting in its excitation to one of its various resonance states. These resonance transition form factors are sensitive to the underlying degrees of freedom of the nucleon and their dynamics while being confined within the nucleon, and therefore serve to understand the emergent complexity of the Universe at the most fundamental level. Experimental observables from single-and double-charged electroproduction channels serve as dominant sources for the extraction of these form factors in the two dimensional landscape spanned by the variables Q2 and W, which map out the space-time scale of the degrees of freedom and their dynamics during the interaction as well as the range of possible excitations of the nucleon, respectively. For the first time, observables in the double-charged channel that are sensitive to the polarization of the virtual photon are measured using the pi(+)pi(-) rho reaction channel. This article presents preliminary measurements for these new observables for 2 GeV2 < Q(2) < 5 GeV2 and 1.400 GeV < W < 2.125 GeV using data collected at the experimental facility of Jefferson Laboratory, preceded by an introduction to these observables.