@article{ef287f9171f648a0b97a3b5003033abe,
title = "First Measurement of Hard Exclusive π- Δ++ Electroproduction Beam-Spin Asymmetries off the Proton",
abstract = "The polarized cross-section ratio σLT′/σ0 from hard exclusive π-Δ++ electroproduction off an unpolarized hydrogen target has been extracted based on beam-spin asymmetry measurements using a 10.2 GeV/10.6 GeV incident electron beam and the CLAS12 spectrometer at Jefferson Lab. The study, which provides the first observation of this channel in the deep-inelastic regime, focuses on very forward-pion kinematics in the valence regime, and photon virtualities ranging from 1.5 GeV2 up to 7 GeV2. The reaction provides a novel access to the d-quark content of the nucleon and to p→Δ++ transition generalized parton distributions. A comparison to existing results for hard exclusive π+n and π0p electroproduction is provided, which shows a clear impact of the excitation mechanism, encoded in transition generalized parton distributions, on the asymmetry.",
author = "{CLAS Collaboration} and S. Diehl and N. Trotta and K. Joo and P. Achenbach and Z. Akbar and Armstrong, {W. R.} and H. Atac and H. Avakian and L. Baashen and Baltzell, {N. A.} and L. Barion and M. Bashkanov and M. Battaglieri and I. Bedlinskiy and F. Benmokhtar and A. Bianconi and Biselli, {A. S.} and F. Boss{\`u} and Brinkmann, {K. T.} and Briscoe, {W. J.} and D. Bulumulla and V. Burkert and R. Capobianco and Carman, {D. S.} and Carvajal, {J. C.} and A. Celentano and G. Charles and P. Chatagnon and V. Chesnokov and G. Ciullo and Cole, {P. L.} and M. Contalbrigo and G. Costantini and V. Crede and A. D'Angelo and N. Dashyan and {De Vita}, R. and A. Deur and C. Djalali and R. Dupre and M. Ehrhart and {El Alaoui}, A. and {El Fassi}, L. and L. Elouadrhiri and S. Fegan and A. Filippi and G. Gavalian and Glazier, {D. I.} and Golubenko, {A. A.} and Paul, {S. J.}",
note = "Publisher Copyright: {\textcopyright} 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.",
year = "2023",
month = jul,
day = "14",
doi = "10.1103/PhysRevLett.131.021901",
language = "אנגלית",
volume = "131",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "2",
}