Near threshold angular distributions for the 2H(γ, λ)X reaction

B. Beckford, P. Bydžovsky, A. Chiba, D. Doi, T. Fujii, Y. Fujii, K. Futatsukawa, T. Gogami, O. Hashimoto, Y. C. Han, K. Hirose, R. Honda, K. Hosomi, T. Ishikawa, H. Kanda, M. Kaneta, Y. Kaneko, S. Kato, D. Kawama, C. KimuraS. Kiyokawa, T. Koike, K. Maeda, K. Makabe, M. Matsubara, K. Miwa, S. Nagao, S. N. Nakamura, A. Okuyama, K. Shirotori, K. Sugihara, K. Suzuki, T. Tamae, H. Tamura, K. Tsukada, F. Yamamoto, T. O. Yamamoto, F. Yonemoto, H. Yamazaki

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A study of the 2H(γ, λ)X reaction was performed using a tagged photon beam at the Research Center for Electron Photon Science (ELPH), Tohoku University. The photoproduced λ was measured in the pφ decay channel by the upgraded Neutral Kaon Spectrometer (NKS2+). The momentum integrated differential cross section was determined as a function of the scattering angle of λ in the laboratory frame for five energy bins. Our results indicated a peak in the cross section at angles smaller than cos θ LAB λ = 0.96. The experimentally obtained angular distributions were compared to isobar models, Kaon-Maid (KM) and Saclay-Lyon A (SLA), in addition to the composite Regge-plus-resonance (RPR) model. Both SLA(rK1Kγ =.1.4) and RPR describe the data quite well in contrast to the KM model, which substantially under-predicted the cross section at the most forward angles. With the anticipated finalized data on λ integrated and momentum dependent differential cross sections of 2H(γ, λ) X [M. Kaneta et al., Nucl. Phys. A 914, 69 (2013)], we present our findings on the angular distributions.

Original languageEnglish
Article number063D01
JournalProgress of Theoretical and Experimental Physics
Issue number6
Publication statusPublished - 2016 Jun


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