Title

Hard exclusive pion electroproduction at backward angles with CLAS

Authors

K. ParkFollow
M. Guidal
R. W. Gothe
B. Pire
K. Semenov-Tian-Shansky
J. -M. Laget
K. P. AdhikariFollow
S. AdhikariFollow
Z. AkbarFollow
H. AvakianFollow
J. BallFollow
I. BalossinoFollow
N. A. BaltzellFollow
L. Barion
M. BattaglieriFollow
I. BedlinskiyFollow
A. S. BiselliFollow
W. J. BriscoeFollow
W. K. BrooksFollow
V. D. BurkertFollow
F. T. Cao
D. S. CarmanFollow
A. CelentanoFollow
G. CharlesFollow
Keith A. Griffioen, College of William and MaryFollow

Document Type

Article

Department/Program

Physics

Journal Title

PHYSICS LETTERS B

Pub Date

5-10-2018

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.; 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.; and Chetry, T., "Hard exclusive pion electroproduction at backward angles with CLAS" (2018). PHYSICS LETTERS B. 37. 340-345. 10.1016/j.physletb.2018.03.026

DOI

10.1016/j.physletb.2018.03.026