Document Type
Article
Publication Date
1-2019
DOI
10.1016/j.physletb.2018.10.013
Publication Title
Physics Letters B
Volume
788
Pages
371-379
Abstract
We report the first experimental measurements of the nine 1-fold differential cross sections for the γ p → π+π−p reaction, obtained with the CLAS detector at Jefferson Laboratory. The measurements cover the invariant mass range of the final state hadrons from 1.6 GeV < W < 2.0 GeV. For the first time the photocouplings of all prominent nucleon resonances in this mass range have been extracted from this exclusive channel. Photoproduction of two charged pions is of particular importance for the evaluation of the photocouplings for the Δ (1620)1/2−, Δ (1700)3/2−, N(1720)3/2+, and Δ (1905)5/2+ resonances, which have dominant decays into the π π N final states rather than the more extensively studied single meson decay channels.
Original Publication Citation
Golovatch, E., Burkert, V. D., Carman, D. S., Gothe, R. W., Hicks, K., Ishkhanov, B. S., . . . Zhao, Z. W. (2019). First results on nucleon resonance photocouplings from the γp → π+π−p reaction. Physics Letters B, 788, 371-379. doi:10.1016/j.physletb.2018.10.013
ORCID
0000-0002-5648-0256 (Amaryan)
Repository Citation
Golovatch, E.; Burkert, V. D.; Carman, D. S.; Gothe, R. W.; Hicks, K.; Amaryan, M. J.; Khachatryan, M.; Klein, A.; Prok, Y.; and CLAS Collaboration, "First Results on Nucleon Resonance Photocouplings from the γp → π+π−p Reaction" (2019). Physics Faculty Publications. 347.
https://digitalcommons.odu.edu/physics_fac_pubs/347
Comments
© 2018 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.