Net-Baryon Production in Nucleus-Nucleus Collisions and Rare QGP Events

1st International Kaidalov Workshop on the Phenomenology of High Energy Particle Physics

Arakelyan, G.H.^1 ; Merino, C.^2 ; Shabelski, Yu.M.^3

A.Alikhanyan National Scientific Laboratory, Yerevan Physics Institut, Yerevan

0036, Armenia^1

Departamento de Física de Partículas, Facultade de Física, Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela

15782, Spain^2

Petersburg Nuclear Physics Institute, NCR Kurchatov Institute, Gatchina, St.Petersburg

188350, Russia^3

关键词: Nuclear clusters;    Nucleus-nucleus collision;    Quark-gluon;    String models;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/607/1/012006/pdf
DOI  :  10.1088/1742-6596/607/1/012006

来源: IOP

【 摘 要 】

The experimental data on net proton and net æ-hyperon spectra obtained by the NA35 Collaboration, as well as the inclusive densities of æ and æobtained by NA49, NA57, and STAR collaborations, are compared with the predictions of the Quark-Gluon String Model. The contributions of String Junction diffusion, interactions with nuclear clusters, and percolation corrections are accounted for. The level of numerical agreement of the calculations with the experimental data is of about 20-30%. We also consider the experimental ratios of multistrange to strange antibaryon production. The significant differences between the experimental /æ and, especially, ω+ /æ values and the QGSM predictions can be interpreted as the signal of the existence of an additional source of multistrange antibaryon production.