Abstract
The proton-proton collisions have been extensively used as a baseline reference for nucleus-nucleus collisions. In this work, Monte Carlo simulations of inelastic head-on pp interactions at $\sqrt s = 6 - 25\,{\rm{GeV}}$ were performed to study the possibilities of the Multi–Purpose Detector (MPD) to register data from small systems at the energy range of NICA. For that purpose the Monte Carlo models EPOS 1.99 and UrQMD 3.4 were used as event generators to analyse the charge particle yield from pp collisions in the framework of MpdRoot. The production of protons, pions and kaons from pp collisions was studied through their mean multiplicity, rapidity spectra and particle ratios as function of the collision energy. The yield of Λ hyperons was also estimated by means of pure Monte Carlo and the reconstruction of the simulated data in MPD. The comparison with recent data from NA61/SHINE experiment is presented.
Highlights
We present a prediction of the charged particle yield in pp collisions using simulated data based on two models, and the neutral Λ hyperon yield obtained by Monte Carlo (MC) simulation and the reconstruction in the central barrel part of Multi–Purpose Detector (MPD)
With the aim of studying, by Monte Carlo, the charged particle multiplicity produced by pp collisions in MPD, events with single head-on inelastic pp interactions were generated with two models, EPOS 1.99 [2] and UrQMD 3.4 [3], and propagated through MPD
GeV, was predicted by MC simulations based on two models, EPOS 1.99 and UrQMD 3.4, used as event generators and the GEANT tools to propagate particles through the MPD structure
Summary
The MPD is the main collision detector of NICA and has the barrel geometry typical of collider detectors [1]. The installation and tests of the main barrel part of MPD, composed by the TPC (Time Projection Chamber), TOF (Time of Flight system) and ECal (Electromagnetic Calorimeter) is scheduled to finish in 2020, together with the FHCal (Forward Hadron Calorimeter) and the FFD (Fast Forward Detector). The proton–proton collisions constitute an essential prerequisite in the MPD/NICA research program, either as a detector performance tool, as a baseline for nucleus–nucleus collision analyses and for a better understanding of light collision systems. We present a prediction of the charged particle yield in pp collisions using simulated data based on two models, and the neutral Λ hyperon yield obtained by Monte Carlo (MC) simulation and the reconstruction in the central barrel part of MPD
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