Document Type
Article
Publication Date
2026
DOI
10.1103/h197-l9dw
Publication Title
Physical Review C
Volume
113
Issue
4
Pages
045207
Abstract
The GLUEX experiment at Jefferson Lab has observed p(p) over bar and, for the first time, ΛΛ over bar and p Λ over bar photoproduction from a proton target at photon energies up to 11.6 GeV. The angular distributions are forward peaked for all produced pairs, consistent with Regge-like t-channel exchange. Asymmetric wide-angle antibaryon distributions show the presence of additional processes. In a phenomenological model, we find consistency with a double-t-channel exchange process where antibaryons are created only at the middle vertex. The model matches all observed distributions with a small number of free parameters. In the hyperon channels, we observe a clear distinction between photoproduction of the ΛΛ over bar and p (Λ) over bar systems but general similarity to the p(p) over bar system. We report both total cross sections and cross sections differential with respect to momentum transfer and the invariant masses of the created particle pairs. No narrow resonant structures were found in these reaction channels. The suppression of ss over bar quark pairs relative to dd over bar quark pairs is similar to what has been seen in other reactions.
Rights
© 2026 The Authors.
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License. Further distribution of this work must maintain attribution to the authors and the published article's title, journal citation, and DOI. Funded by SCOAP³.
Data Availability
Article states: "The data that support the findings of this article are not publicly available upon publication because it is not technically feasible and/or the cost of preparing, depositing, and hosting the data would be prohibitive within the terms of this research project. They data are available from the authors upon reasonable request."
Original Publication Citation
Afzal, F., Albrecht, M., Amaryan, M., Arrigo, S., Arroyave, V., Asaturyan, A., Austregesilo, A., Baldwin, Z., Barbosa, F., Barlow, J., Barriga, E., Barsotti, R., Barton, D., Baturin, V., Berdnikov, V. V., Berger, A., Boeglin, W., Boer, M., Briscoe, W. J.,…Collaboration, G. (2026). Baryon-antibaryon photoproduction cross sections off the proton. Physical Review C, 113(4), Article 045207. https://doi.org/10.1103/h197-l9dw
ORCID
0000-0002-5648-0256 (Amaryan), 0009-0007-5646-2473 (Barton), 0009-0003-5562-6465 (Viducic)
Repository Citation
Afzal, F.; Albrecht, M.; Amaryan, M.; Arrigo, S.; Arroyave, V.; Asaturyan, A.; Austregesilo, A.; Baldwin, Z.; Barbosa, F.; Barlow, J.; Barriga, E.; Barsotti, R.; Barton, D.; Baturin, V.; Berdnikov, V. V.; Berger, A.; Boeglin, W.; Boer, M.; Briscoe, W. J.; Britton, T.; Brunner, R.; Cao, S.; Chen, C.; Chudakov, E.; Chung, G.; Cole, P. L.; Cortes, O.; Crede, V.; Dalton, M. M.; Darulis, D.; Deur, A.; Dietrich, L.; Dobbs, S.; Dolgolenko, A.; Dugger, M.; Dzhygadlo, R.; Ebersole, D.; Edo, M.; Egiyan, H.; Eugenio, P.; Fabrizi, A.; Fanelli, C.; Fang, S.; Fritsch, M.; Furletov, S.; Gan, L.; Gao, H.; Gardner, A.; Gasparian, A.; Glazier, D. I.; Gleason, C.; Grube, B.; Guo, J.; Hernandez, J.; Hernandez, K.; Herrmann, N.; Hoffman, N. D.; Hornidge, D.; Huber, G. M.; Hurck, P.; Imoehl, W.; Ireland, D. G.; Ito, M. M.; Jaegle, I.; Jarvis, N. S.; Jeske, T.; Jing, M.; Jones, R. T.; Kayokan, V.; Kalicy, G.; Kang, X.; Khachatryan, V.; Kourkoumelis, C.; LaDuke, A.; Larin, I.; Lawrence, D.; Lersch, D. I.; Li, H.; Liu, B.; Livingston, K.; Lorenti, L.; Lyubovitskij, V.; Marukyan, H.; Matveev, V.; McCaughan, M.; McCracken, M.; Mayer, C. A.; Miskimen, R.; Mitchell, R. E.; Moran, P.; Ng, L.; Nissen, E.; Orešić, S.; Ostrovidov, A. I.; Papandreou, Z.; Pentchev, L.; Peters, K. J.; Veetil, L. Puthiya; Rakshit, S.; Reinhold, J.; Remington, A.; Ritman, J.; Rodriguez, G.; Saldana, K.; Schadmand, S.; Schertz, A. M.; Scheuer, K.; Schmidt, A.; Schumacher, R. A.; Schwiening, J.; Scott, M.; Septian, N.; Sharp, P.; Shen, V. J.; Shen, X.; Shepherd, M. R.; Sikes, J.; Singh, H.; Smith, A.; Smith, E. S.; Somov, A.; Somov, S.; Stevens, J. R.; Strakovsky, I. I.; Sumner, B.; Suresh, K.; Tarasov, V. V.; Taylor, S.; Teymurazyan, A.; Thiel, A.; Thomson, M.; Viducic, T.; Whitlatch, T.; Wunderlich, Y.; Yu, B.; Zarling, J.; Zhang, Z.; Zhou, X.; and Zihlmann, B., "Baryon-Antibaryon Photoproduction Cross Sections Off the Proton" (2026). Physics Faculty Publications. 1054.
https://digitalcommons.odu.edu/physics_fac_pubs/1054