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 pπ− decay channel by the upgraded Neutral Kaon Spectrometer (NKS2+). The momentum integrated differential cross section was determined as a function of the scatting angle of Λ in the laboratory frame for five energy bins. Our results indicated a peak in the cross section at angles smaller than cosθΛLAB = 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~\cite{Kaneta_Beckford}, we present our findings on the angular distributions in this report.
@article{arxiv.1308.1649,
title = {Near threshold angular distributions of the $^2$H$(\gamma,\Lambda)$X reaction},
author = {B. Beckford and P. Bydzovsky and A. Chiba and D. Doi and T. Fujii and Y. Fujii and K. Futatsukawa and T. Gogami and O. Hashimoto and Y. C. Han and K. Hirose and R. Honda and K. Hosomi and T. Ishikawa and H. Kanda and M. Kaneta and Y. Kaneko and S. Kato and D. Kawama and C. Kimura and S. Kiyokawa and T. Koike and K. Maeda and K. Makabe and M. Matsubara and K. Miwa and S. Nagao and S. N. Nakamura and A. Okuyama and K. Shirotori and K. Sugihara and K. Suzuki and T. Tamae and H. Tamura and K. Tsukada and F. Yamamoto and T. O. Yamamoto and Y. Yonemoto and H. Yamazaki},
journal= {arXiv preprint arXiv:1308.1649},
year = {2014}
}