Near threshold angular distributions for the 2H(γ, Λ)X reaction. (30th June 2016)

• Record Type: Journal Article
• Authors: Beckford, B.; Byd̆zovský, P.; Chiba, A.; Doi, D.; Fujii, T.; Fujii, Y.; Futatsukawa, K.; Gogami, T.; Hashimoto, O.; Han, Y. C.; Hirose, K.; Honda, R.; Hosomi, K.; Ishikawa, T.; Kanda, H.; Kaneta, M.; Kaneko, Y.; Kato, S.; Kawama, D.; Kimura, C.; Kiyokawa, S.; Koike, T.; Maeda, K.; Makabe, K.; Matsubara, M.; Miwa, K.; Nagao, S.; Nakamura, S. N.; Okuyama, A.; Shirotori, K.; Sugihara, K.; Suzuki, K.; Tamae, T.; Tamura, H.; Tsukada, K.; Yamamoto, F.; Yamamoto, T. O.; Yonemoto, F.; Yamazaki, H.;
• Is Part Of: Progress of theoretical and experimental physics. Volume 2016:Number 6(2016:Jun.)
• Publication Date: 2016-06-30
• Subjects: Physics -- Periodicals; Mathematical physics -- Periodicals; 530.05
• DOI: 10.1093/ptep/ptw071
• Languages: English
• ISSNs: 2050-3911

Abstract

Abstract: A study of the $^2$ H$({\gamma}, {\Lambda})$ X reaction was performed using a tagged photon beam at the Research Center for Electron Photon Science (ELPH), Tohoku University. The photoproduced $\Lambda$ was measured in the $p{\pi^{-}}$ 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 ${\Lambda}$ in the laboratory frame for five energy bins. Our results indicated a peak in the cross section at angles smaller than $\cos\theta^{\mathrm{LAB}}_{\Lambda}$ = $0.96$ . 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(r$K_{1}K_{\gamma}$ = $-1.4$ ) 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 ${\Lambda}$ integrated and momentum dependent differential cross sections of $^2$ H$({\gamma}, {\Lambda})$ X [M. Kaneta et al., Nucl. Phys. A 914, 69 (2013)], we present our findings on the angular distributions.