학술논문
Observation of a cusp-like structure in the $\gamma p \rightarrow K^+\Sigma^0$ cross section at forward angles and low momentum transfer
Document Type
Working Paper
Author
Jude, T. C.; 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.; 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.; Stugelev, A.; Sumachev, V.; Vegna, V.; Tarakanov, V.; Zimmermann, T.
Source
Subject
Language
Abstract
The $\gamma p \rightarrow K^+\Sigma^0$ differential cross section at extremely forward angles was measured at the BGOOD experiment. A three-quarter drop in strength over a narrow range in energy and a strong dependence on the polar angle of the $K^+$ in the centre-of-mass of the reaction is observed at a centre-of-mass energy of 1900\,MeV. Residing close to multiple open and hidden strangeness thresholds, the structure appears consistent with meson-baryon threshold effects which may contribute to the reaction mechanism.
Comment: 9 pages (including a 2 page appendix of tabulated data), 10 figures
Comment: 9 pages (including a 2 page appendix of tabulated data), 10 figures