2013/07/14 by Ju-Jun Xie, Xie, Ju-Jun, Bochao Liu +4
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #Atomic and Subatomic Physics Research #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.48550/arxiv.1307.3707
To be published on Phys. Rev. C
arxiv created 2013/07/14 · openalex publication_date 2013/07/14 · arxiv updated 2013/07/16 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28
The value of the Λ(1405) KN coupling constant g_Λ(1405)KN is obtained by fitting it to the experimental data on the total cross sections of the K-p → π0Σ0 reaction. On the basis of an effective Lagrangian approach and isobar model, we show that the value |g_Λ(1405)KN| = 1.51 ± 0.10 could be extracted from the available experimental data by assuming that the s-channel Λ(1405) resonance plays a dominant role, whereas, the background contributions from the s-channel Λ(1115), t-channel K^* and u-channel nucleon pole processes are small and can be neglected. However, the u-channel nucleon pole diagram may also give an important contribution in the present calculations. After the background contributions are taken into account, the above value of g_Λ(1405)KN is reduced to |g_Λ(1405)KN| = 0.77 ± 0.07, which is not supported by the previous calculations and the recent CLAS measurements. The theoretical calculations on differential cross sections are also presented, which can be checked by future experiments.