Hard exclusive pion electroproduction at backward angles with CLAS
- Park, K.
- Guidal, M.
- Gothe, R. W.
- Pire, B.
- Semenov-Tian-Shansky, K.
- Laget, J. M.
- Adhikari, K. P.
- Adhikari, S.
- Akbar, Z.
- Avakian, H.
- Ball, J.
- Balossino, I.
- Baltzell, N. A.
- Barion, L.
- Battaglieri, M.
- Bedlinskiy, I.
- Biselli, A. S.
- Briscoe, W. J.
- Brooks, W. K.
- Burkert, V. D.
- Cao, F. T.
- Carman, D. S.
- Celentano, A.
- Charles, G.
- Chetry, T.
- Fedotov, G.
- Hicks, K.
- Niculescu, G.
DOIAbstract
© 2018 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
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