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arXiv · 1711.08486

Hard exclusive pion electroproduction at backward angles with CLAS

K. Park·M. Guidal·R. W. Gothe·B. Pire·K. Semenov-Tian-Shansky·J. -M. Laget
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Abstract

We report on the first measurement of cross sections for exclusive deeply virtual pion electroproduction off the proton, $e p \to e^\prime n \pi^+$, above the resonance region at backward pion center-of-mass angles. The $\varphi^*_{\pi}$-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) and shed new light on nucleon structure.

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K. Park, M. Guidal, R. W. Gothe, B. Pire, K. Semenov-Tian-Shansky, J. -M. Laget. 2017-11-22. Hard exclusive pion electroproduction at backward angles with CLAS. https://doi.org/10.1016/j.physletb.2018.03.026

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