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Hard exclusive pion electroproduction at backward angles with CLAS

Park, K.
; 
Guidal, M.
; 
Gothe, R. W.
; 
Griffioen, Keith A
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.
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2018-05-10
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American Physical Society
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Physics
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j.physletb.2018.03.026
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Physics
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https://doi.org/10.1016/j.physletb.2018.03.026
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https://scholarworks.wm.edu/handle/internal/1502
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