@article{e417b3c07b45427aa46d35a266f10ef0,
title = "Extraction of Beam-Spin Asymmetries from the Hard Exclusive π+ Channel off Protons in a Wide Range of Kinematics",
abstract = "We have measured beam-spin asymmetries to extract the sinφ moment ALUsinφ from the hard exclusive e→p→e′nπ+ reaction above the resonance region, for the first time with nearly full coverage from forward to backward angles in the center of mass. The ALUsinφ moment has been measured up to 6.6 GeV2 in -t, covering the kinematic regimes of generalized parton distributions (GPD) and baryon-to-meson transition distribution amplitudes (TDA) at the same time. The experimental results in very forward kinematics demonstrate the sensitivity to chiral-odd and chiral-even GPDs. In very backward kinematics where the TDA framework is applicable, we found ALUsinφ to be negative, while a sign change was observed near 90° in the center of mass. The unique results presented in this Letter will provide critical constraints to establish reaction mechanisms that can help to further develop the GPD and TDA frameworks.",
author = "{(The CLAS Collaboration)} and S. Diehl and K. Joo and A. Kim and H. Avakian and P. Kroll and K. Park and D. Riser and K. Semenov-Tian-Shansky and K. Tezgin and Adhikari, {K. P.} and S. Adhikari and Amaryan, {M. J.} and G. Angelini and G. Asryan and H. Atac and L. Barion and M. Battaglieri and I. Bedlinskiy and F. Benmokhtar and A. Bianconi and Biselli, {A. S.} and F. Boss{\`u} and S. Boiarinov and Briscoe, {W. J.} and Brooks, {W. K.} and D. Bulumulla and Burkert, {V. D.} and Carman, {D. S.} and Carvajal, {J. C.} and A. Celentano and P. Chatagnon and T. Chetry and G. Ciullo and L. Clark and Cole, {P. L.} and M. Contalbrigo and V. Crede and A. D'Angelo and N. Dashyan and {De Vita}, R. and M. Defurne and A. Deur and C. Dilks and C. Djalali and R. Dupre and H. Egiyan and M. Ehrhart and {El Alaoui}, A. and {El Fassi}, L. and Jo, {H. S.}",
note = "Publisher Copyright: {\textcopyright} 2020 American Physical Society.",
year = "2020",
month = oct,
day = "28",
doi = "10.1103/PhysRevLett.125.182001",
language = "English",
volume = "125",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "18",
}