Abstract
The Generalized Parton Distributions (GPDs) parameterize the non-pertubative content of the nucleon. They appear in the amplitude of hard exclusive processes such as DVCS on the proton (ep → epγ). They correlate the spatial and momentum structure of the nucleon in terms of partonic degrees of freedom. The introduction of transition GPDs extended the GPD formalism to more general final states. These GPDs can be used for instance to describe processes where the recoil nucleon is excited into a nucleon resonance. In this paper we focus on the N-Δ transition. The simplest process to access N-Δ transition GPDs is the ΔVCS (ep → eΔ+γ). First experimental beam spin asymmetry results associated to this process and obtained from CLAS data are presented. The Δ+ decaying into Nπ pair, the analysis focused on the ep → eNπγ reactions in the Δ+ region.
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