$ k^+λ$在正角和低动量转移处的光增生

论文标题

$ k^+λ$在正角和低动量转移处的光增生

$K^+Λ$ photoproduction at forward angles and low momentum transfer

论文作者

Alef, S., Bauer, P., Bayadilov, D., Beck, R., Bella, A., Bieling, J., Braghieri, A., Cole, P. L., Elsner, D., Di Salvo, R., Fantini, A., Freyermuth, O., Frommberger, F., Ghio, F., Goertz, S., Gridnev, A., Hammann, D., Hannappel, J., Jude, T. C., Kohl, K., Kozlenko, N., Sandri, A. Lapik P. Levi, Lisin, V., Mandaglio, G., Messi, F., Messi, R., Moricciani, D., Nedorezov, V., Nikonov, V. A, Novinskiy, D., Pedroni, P., Polonskiy, A., Reitz, B. -E., Romaniuk, M., Sarantsev, A. V, Scheluchin, G., Schmieden, H., Stuglev, A., Sumachev, V., Vegna, V., Tarakanov, V., Zimmermann, T.

论文摘要

$γp\ rightArrow k^+λ$差分横截面和从阈值的反冲偏振数据显示出极端角度的阈值。测量是在ELSA的BGood实验上进行的，利用高角度和动量分辨率向前光谱仪进行带电的粒子鉴定。随着最小动量转移到后退超子的接近，数据在世界数据集中区分了矛盾的结果，并启用了横截面的提取。

$γp \rightarrow K^+ Λ$ differential cross sections and recoil polarisation data from threshold for extremely forward angles are presented. The measurements were performed at the BGOOD experiment at ELSA, utilising the high angular and momentum resolution forward spectrometer for charged particle identification. The data discriminates between conflicting results in the world data set and enable extraction of the cross section as the minimum momentum transfer to the recoiling hyperon is approached.

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