Hard exclusive pion electroproduction at backward angles with CLAS

Authors

K. Park
M. Guidal
R. W. Gothe
(…)
Keith A. Griffioen, William & MaryFollow
et al.

Document Type

Article

Department/Program

Physics

Journal Title

PHYSICS LETTERS B

Pub Date

5-10-2018

Publisher

American Physical Society

Volume

780

Abstract

We report on the first measurement of cross sections for exclusive deeply virtual pion electroproduction off the proton, ep -> e'n pi(+), above the resonance region at backward pion center-of-mass angles. The phi(pi)*-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. (C) 2018 The Authors. Published by Elsevier B.V.

Recommended Citation

Park, K.; Guidal, M.; Gothe, R. W.; (…); Griffioen, Keith A.; and et al., Hard exclusive pion electroproduction at backward angles with CLAS (2018). PHYSICS LETTERS B, 780.
https://doi.org/10.1016/j.physletb.2018.03.026

DOI

https://doi.org/10.1016/j.physletb.2018.03.026