K^+Λ(1520) Photoproduction at Forward Angles Near Threshold with the BGOOD Experiment

E. O. Rosanowski,T. C. Jude,S. Alef, A. J. Clara Figueiredo, D. D Burdeinyi, P. L. Cole, R. Di Salvo,D. Elsner,A. Fantini,O. Freyermuth,F. Frommberger, V. B Ganenko,F. Ghio, J. Groß,K. Kohl,P. Levi Sandri,G. Mandaglio,R. Messi,D. Moricciani,P. Pedroni,B. -E. Reitz,M. Romaniuk,G. Scheluchin,H. Schmieden,A. Sonnenschein

arxiv（2024）

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摘要

The differential cross section for γ p→ K^+Λ(1520) was measured from threshold to a centre-of-mass energy of 2090 MeV at forward angles at the BGOOD experiment. The high statistical precision and resolution in centre-of-mass energy and angle allows a detailed characterisation of this low-momentum transfer kinematic region. The data agree with a previous LEPS measurement and support effective Lagrangian models that indicate that the contact term dominates the cross section near threshold.

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