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.

Park, K., Guidal, M., Gothe, R.w., Pire, B., Semenov-Tian-Shansky, K., Laget, J.-., et al. (2018). Hard exclusive pion electroproduction at backward angles with CLAS. PHYSICS LETTERS. SECTION B, 780, 340-345 [10.1016/j.physletb.2018.03.026].

Hard exclusive pion electroproduction at backward angles with CLAS

D'Angelo, A.;Lanza, L.;Rizzo, A.;
2018-05-10

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.
10-mag-2018
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Con Impact Factor ISI
CLAS; Eletroproduction; Exclusive single pion; TDA; Nuclear and High Energy Physics
CLAS Collaboration
http://www.sciencedirect.com/science/journal/03702693
Park, K., Guidal, M., Gothe, R.w., Pire, B., Semenov-Tian-Shansky, K., Laget, J.-., et al. (2018). Hard exclusive pion electroproduction at backward angles with CLAS. PHYSICS LETTERS. SECTION B, 780, 340-345 [10.1016/j.physletb.2018.03.026].
Park, K; Guidal, M; Gothe, Rw; Pire, B; Semenov-Tian-Shansky, K; Laget, J-; Adhikari, Kp; Adhikari, S; Akbar, Z; Avakian, H; Ball, J; Balossino, I; Ba...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/207315
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