Quark-gluon string-model description of baryon production in K ± N interactions

Abstract

The process of baryon production in Kp collisions at high energies is considered in the framework of the Quark-Gluon String Model. The contribution of the string-junction mechanism to the strange baryon production is analysed. The results of numerical calculations are in reasonable agreement with the data on inclusive spectra of p, Λ,Λ, and on theΛ/Λ asymmetry. The predictions for Ξ and Ω baryons are presented.

Feynman scaling violation due to baryon number diffusion in rapidity space

“…This picture leads to some general phenomenological predictions. In the case of inclusive reactions the baryon number transfer to large rapidity distances in hadron-nucleon and hadronnucleus reactions can be explained [14,24,34,35,36] by SJ diffusion.…”

Proton and Λ hyperon production in nucleus-nucleus collisions

“…2a. However, in the processes with incident baryons there exists another possibility to produce a secondary baryon in the central region, called SJ diffusion. The quantitative description of the baryon number transfer due to SJ diffusion in rapidity space was obtained in [19] and following papers [4,5,20,21,22,24].…”

“…The significant differences in the yields of baryons and antibaryons in the central (midrapidity) region are present even at high energies. This effect can be explained [4,5,19,20,21,22,23,24] in QGSM by the special structure of baryons consisting of three valence quarks together with a special configuration of gluon field, called String Junction [25,26,27,28].…”

Secondary Baryon Asymmetry in pi(+-)p Collisions

“…It is important to understand the role of the SJ mechanism in the dynamics of high energy hadronic interactions, in particular in processes implying baryon number transfer [13][14][15]. Significant results for hadron-hadron and hadron-nucleus collisions were obtained in [15][16][17][18][19][20][21][22].…”

“…The SJ mechanism does not affect the production of antibaryons, so the Λ spectrum doesnÂt't depend on the value of α SJ , and it has a very small dependence on the strange quark suppression factor δ (see [18,19]).…”