$$K^{+}\Lambda $$ photoproduction at forward angles and low momentum transfer
S. Alef, P. Bauer, D. Bayadilov, R. Beck, A. Bella, J. Bieling, A. Braghieri, P. L. Cole, D. Elsner, R. Di Salvo, A. Fantini, O. Freyermuth, F. Frommberger, F. Ghio, S. Goertz, A. Gridnev, D. Hammann, J. Hannappel, T. C. Jude, K. Kohl, N. Kozlenko, A. Lapik, P. Levi Sandri, V. Lisin, G. Mandaglio, F. Messi, R. Messi, D. Moricciani, V. Nedorezov, V. A. Nikonov, D. Novinskiy, P. Pedroni, A. Polonskiy, B.-E. Reitz, M. Romaniuk, A. V. Sarantsev, G. Scheluchin, H. Schmieden, A. Stuglev, V. Sumachev, V. Vegna, V. Tarakanov, T. Zimmermann
Abstract
Abstract $$\gamma p \rightarrow K^{+} \Lambda $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>γ</mml:mi> <mml:mi>p</mml:mi> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mi>Λ</mml:mi> </mml:mrow> </mml:math> 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 high statistics and forward angle acceptance enables the extraction of the cross section as the minimum momentum transfer to the recoiling hyperon is approached.