1996/09/23 by Sven Steininger, S. Steininger, Ulf-G. Meißner
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.1016/s0370-2693(96)01490-6
published as Phys.Lett. B391 (1997) 446-450 · 9 pp, LaTeX, 3 figs, uses epsf
arxiv created 1996/09/23 · openalex publication_date 1997/01/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We calculate the processes γp → K0 Σ+ , K+ Σ0, K+ Λ in three flavor heavy baryon chiral perturbation theory to one loop. Some low--energy constants are fixed from single baryon properties while others are estimated by means of resonance saturation. The total cross sections are comparable with the few existing data points in the threshold region. The angular dependences of the recoil polarization of the Λ and Σ0 show most features of the ones measured at ELSA. We also predict the isovector charge radius of the Σ+, < r2V >Σ+ = (0.30 ± 0.03) fm2.