DOI

10.1016/j.physletb.2018.03.026

Abstract

We report on the first measurement of cross sections for exclusive deeply virtual pion electroproduction off the proton, ep→e′nπ+, above the resonance region at backward pion center-of-mass angles. The φπ⁎-dependent cross sections were measured, from which we extracted three combinations of structure functions of the proton. Our results are compatible with calculations based on nucleon-to-pion transition distribution amplitudes (TDAs). These non-perturbative objects are defined as matrix elements of three-quark-light-cone-operators and characterize partonic correlations with a particular emphasis on baryon charge distribution inside a nucleon. Keywords: TDA, Exclusive single pion, Eletroproduction, CLAS

Document Type

Article

Publication Date

5-10-2018

Publisher Statement

Copyright © 2018 Elsevier B.V. This article first appeared in Physics Letters B 780, (May 10,2018): 340-245. doi:10.1016/j.physletb.2018.03.026.

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