Speaker
Description
We examine the $K \Lambda$ production induced by real/virtual photons on the nucleon target, covering an energy range from threshold to photon energies of 3 GeV. This process provides vital insights into nucleon resonances, particularly those in higher resonance regions. Key objectives in studying kaon photo- and electroproduction on nucleons include investigating the baryon resonance spectrum and exploring interactions within hyperon-meson systems. Additionally, accurately modeling the fundamental production mechanisms is critical for reliable predictions of cross-sections in hypernucleus production.
With advanced photon and electron beams available at facilities like the Electron Stretcher System (ELSA) in Bonn, Super Photon Ring - 8 GeV (SPring-8) in Osaka, the European Synchrotron Radiation Facility (ESRF) in Grenoble, the Mainz Microtron (MAMI), and CEBAF at Jefferson Lab, precise cross-section measurements of the $K\Lambda$ channel are now feasible, renewing interest in this area. Our theoretical model accounts for contributions from both non-resonant background terms, constructed using chiral Lagrangian formalism to encompass all essential diagrams and resonance terms, specifically resonances $S_{11}(1650)$, $P_{13}(1720)$, and $P_{13}(1900)$ via the s-channel. We rely on the MAID ansatz for resonance form factors. We present differential and total cross-section results and fine-tune resonance parameters to align with electro- and photoproduction data. A comparison of our findings with existing CLAS, SAPHIR, and MAMI experimental data was also made.
Our study on photon-induced $K\Lambda$ production could provide valuable insights for upcoming experiments at TJNAF, SPring-8, and MAMI in this energy range. We also plan to theoretically examine weakly associated production cross-sections driven by charged current (CC) and neutral current (NC) interactions, which are particularly relevant for current neutrino oscillation studies. Remarkably, few recent investigations have addressed these processes, aside from the work by Adera et al., despite their importance for (anti)neutrino cross-section modeling.
| Field of contribution | Phenomenology |
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