Production of {\Lambda} hyperons in 4.0A GeV and 4.5A GeV carbon-nucleus interactions at the Nuclotron

TL;DR

This study measures the production of b1 hyperons in carbon-nucleus collisions at 4.0A and 4.5A GeV energies, comparing experimental data with several transport model predictions.

Contribution

First fixed-target experiment at JINR NICA providing b1 hyperon spectra in carbon-ion collisions at these energies.

Findings

b1 hyperon yields are measured across different targets.

Data are compared with DCM-SMM, UrQMD, and PHSD models.

Results are consistent with previous measurements at similar energies.

Abstract

The BM@N experiment (Baryonic Matter at the Nuclotron) is the first fixed-target experiment at the JINR NICA accelerator complex. In this work, data on the interactions of a carbon-ion beam with kinetic energies of 4.0A~GeV and 4.5A~GeV with C, Al, Cu, and Pb targets are used to measure transverse momentum spectra and rapidity distributions of $\Lambda$ hyperon yields. The results are compared with the predictions of DCM-SMM, UrQMD, and PHSD transport models and with the $\Lambda$ yield measurements in other experiments at similar collision energies.