Bayesian Model Selection for Electromagnetic Kaon Production on the Nucleon

Details Bayesian Model Selection for Electromagnetic Kaon Production on the Nucleon Bayesian Model Selection for Electromagnetic Kaon Production on the Nucleon

2011-03-10

arxiv.org/abs/1103.2048v1

Int.J.Mod.Phys.A26:642-644,2011

Physics

Nuclear Physics

Nuclear Theory

3 pages; Proceedings 11th International Workshop on Meson Production, Properties and Interaction, Krakow, 2011

Scientific paper

10.1142/S0217751X11052323

We present the results of a Bayesian analysis of a Regge model for K+ Lambda photoproduction. The model is based on the exchange of K+(494) and K*+(892) trajectories in the t-channel. For different prior widths, we find decisive Bayesian evidence (\Delta ln Z ~ 24) for a K+ Lambda photoproduction Regge model with a positive vector coupling and a negative tensor coupling constant for the K+(892) trajectory, and a rotating phase factor for both trajectories. Using the chi^2 minimization method, one could not draw this conclusion from the same dataset.

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