Electroproduction of the Λ/Σ0 hyperons at Q2 ≃ 0.5 (GeV/c)2 at forward angles

• Published in: Physical review. C 2024-08, Vol.110 (2)
• Main Authors: Okuyama, K., Itabashi, K., Nagao, S., Nakamura, S. N., Suzuki, K. N., Gogami, T., Pandey, B., Tang, L., Bydžovský, P., Skoupil, D., Mart, T., Abrams, D., Akiyama, T., Androic, D., Aniol, K., Ayerbe Gayoso, C., Bane, J., Barcus, S., Barrow, J., Bellini, V., Bhatt, H., Bhetuwal, D., Biswas, D., Camsonne, A., Castellanos, J., Chen, J. -P., Chen, J., Covrig, S., Chrisman, D., Cruz-Torres, R., Das, R., Fuchey, E., Gnanvo, K., Garibaldi, F., Gautam, T., Gomez, J., Gueye, P., Hague, T. J., Hansen, O., Henry, W., Hauenstein, F., Higinbotham, D. W., Hyde, C. E., Kaneta, M., Keppel, C., Kutz, T., Lashley-Colthirst, N., Li, S., Liu, H., Mammei, J., Markowitz, P., McClellan, R. E., Meddi, F., Meekins, D., Michaels, R., Mihovilovič, M., Moyer, A., Nguyen, D., Nycz, M., Owen, V., Palatchi, C., Park, S., Petkovic, T., Premathilake, S., Reimer, P. E., Reinhold, J., Riordan, S., Rodriguez, V., Samanta, C., Santiesteban, S. N., Sawatzky, B., Širca, S., Slifer, K., Su, T., Tian, Y., Toyama, Y., Uehara, K., Urciuoli, G. M., Votaw, D., Williamson, J., Wojtsekhowski, B., Wood, S. A., Yale, B., Ye, Z., Zhang, J., Zheng, X.
• Format: Article
• Language: English
• Subjects: electroweak interactions; hypernuclei; mesic nuclei; nuclear physics; NUCLEAR PHYSICS AND RADIATION PHYSICS; particle & resonance production
• ISSN: 2469-9985
• DOI: 10.1103/physrevc.110.025203

In 2018, the E12-17-003 experiment was conducted at the Thomas Jefferson National Accelerator Facility (JLab) to explore the possible existence of an nn⁢Λ state in the reconstructed missing mass distribution from a tritium gas target [K. N. Suzuki et al., Prog. Theor. Exp. Phys. 2022, 013D01 (2022); B. Pandey et al., Phys. Rev. C 105, L051001 (2022)]. As part of this investigation, data were also collected using a gaseous hydrogen target, not only for a precise absolute mass scale calibration but also for the study of Λ/Σ0 electroproduction. This dataset was acquired at Q2 ≃ 0.5 (GeV/c)2, W = 2.14 GeV, and θ$^{c.m.}_{γK}$ ≃ 8°. It covers forward angles where photoproduction data are scarce and a low-Q2 region that is of interest for hypernuclear experiments. On the other hand, this kinematic region is at a slightly higher Q2 than previous hypernuclear experiments, thus providing crucial information for understanding the Q2 dependence of the differential cross sections for Λ/Σ0 hyperon electroproduction. Here, this paper reports on the Q2 dependence of the differential cross section for the e + p → e' + K+ + Λ/Σ0 reaction at 0.2–0.8 (GeV/c)2, and provides comparisons with the currently available theoretical models.