Hyperon electroproduction in a crossing and duality constrained model

Strangeness production by electromagnetic and hadronic probes

“…5 shows the Transverse and Longitudinal cross sections of the p(e, e ′ K + )Λ reaction, which have been recently determined at JLab [21] through a Rosenbluth separation. While Lagrangian Models [13,22] predict a linear rise of their ratio with the four momentum transfer Q 2 of the virtual photon, the Regge model [20] correctly reproduces the saturation and the decrease of the ratio at higher virtuality of the photon. To summarize, at low energies (let say below 2 GeV) where many resonances contribute, only a comprehensive experimental determination of the reaction amplitudes (partial wave analysis) will allow to decipher the various contributions and constrain Lagrangian models.…”

Strangeness production on the nucleon

“…In the literature , only a limited number of theoretical studies on the p(e, e K)Y reaction can be found [11,13,38,39,64,65]. Most of those studies are based on isobar models which try to account for the photo and electroproduction data simultaneously.…”

“…In developing his model, Veneziano was guided by the duality requirement for the crossing symmetric process. The duality hypothesis states that, when computing a scattering amplitude, it does not really matter whether the summation is performed over all the s-channel or all the t-channel poles [11,75]. Or, formally:…”

“…Despite these reservations, we will retain model C in the forthcoming discussions. In literature, the procedure of freely varying g K + Λp and g K + Σ 0 p parameters is adopted by several authors [11,12,26] and, in general, leads to very satisfactory descriptions of the data.…”

“…This work marked the start of a long series of theoretical efforts in this field [8][9][10][11][12][13][14][15][16]. The earliest works clearly lacked the presence of a reliable database.…”