Measurement of Single Differential Cross Sections, Polarization Observables, and Beam-Spin Asymmetry in Charged Two-Pion Electroproduction Off the Proton

Emergent phenomena are described as such due to functional differences in paradigms based on observation scale, one of the most fundamental being the emergence of hadronic structure from bare quarks and gluons, as dictated by the strong interaction. Measurement of charged two-pion electroproduction off the proton with CLAS in run group E1-6 and the extraction of single differential cross sections, polarization observables, and beam-spin asymmetries was performed as a necessary step in illuminating the length scale currently dark to Quantum Chromodynamics within the structure of the proton. Understanding the scale-dependent nature of this hadronic structure is integral to understanding nature at the most fundamental level. Measurements were made with respect to three variable sets, each highlighting a common decay mode of the excited nucleon for the W-$Q^2$ region: [1.4 $GeV$, 2.125 $GeV$)-[2.0 $GeV^2$, 5.0 $GeV^2$). New analysis techniques were implemented, including localized kinematic hole filling which was used for imparting a helicity dependence on the helicity blind estimation of kinematic hole filling for the measurement of the beam-spin asymmetry. Such techniques were also introduced to the other measurements and compared with previous methodologies.