scholarly journals System size dependence of particle production in EPOS

2018 ◽  
Vol 1070 ◽  
pp. 012007
Author(s):  
K. Werner ◽  
B. Guiot ◽  
Iu. Karpenko ◽  
T. Pierog ◽  
G. Sophys ◽  
...  
Keyword(s):  
Particle Production ◽  
Size Dependence ◽  
System Size

scholarly journals System size dependence of the non-monotonous pion freeze-out volume excitation function

Open Physics ◽  
2012 ◽  
Vol 10 (5) ◽  
Author(s):  
Qingfeng Li ◽  
Caiwan Shen ◽  
Marcus Bleicher
Keyword(s):  
Excitation Function ◽  
Local Minimum ◽  
Particle Production ◽  
Size Dependence ◽  
Transport Model ◽  
System Size ◽  
Charged Pions ◽  
String Formation ◽  
Hbt Correlation ◽  
Freeze Out

AbstractHanburry-Brown-Twiss (HBT) correlation functions and radii of negatively charged pions from C+C, Si+Si, Cu+Cu, and In+In at lower RHIC/SPS energies are calculated with the UrQMD transport model and the CRAB analyzing program. We find a minimum in the excitation function of the pion freeze-out volume at low transverse momenta and around E lab ∼ 20–30AGeV which can be related to the change from initial string emission to bulk emission from the created resonance matter. For small systems, we predict a local minimum in the excitation function of the HBT (freeze-out) volume which is explained by the competition of two mechanisms of the particle production, namely resonance decays and string formation/fragmentation.

scholarly journals Resonance production in high energy collisions from small to big systems

2018 ◽  
Vol 171 ◽  
pp. 09002 ◽  
Author(s):  
K. Werner ◽  
A. G. Knospe ◽  
C. Markert ◽  
B. Guiot ◽  
Iu. Karpenko ◽  
...  
Keyword(s):  
Particle Production ◽  
Size Dependence ◽  
System Size ◽  
High Energy ◽  
Resonance Production ◽  
Proton Proton ◽  
High Energy Collisions

The aim of this paper is to understand resonance production (and more generally particle production) for different collision systems, namely proton-proton (pp), proton-nucleus (pA), and nucleus-nucleus (AA) scattering at the LHC. We will investigate in particular particle yields and ratios versus multiplicity, using the same multiplicity definition for the three different systems, in order to analyse in a compact way the evolution of particle production with the system size and the origin of a very different system size dependence of the different particles.

scholarly journals Particle production at RHIC and LHC energies

2015 ◽  
Vol 30 (22) ◽  
pp. 1550131 ◽  
Author(s):  
A. Tawfik ◽  
E. Gamal ◽  
A. G. Shalaby
Keyword(s):  
Particle Production ◽  
Hadron Collider ◽  
Center Of Mass ◽  
System Size ◽  
Alice Experiment ◽  
Center Of Mass Energy ◽  
Particle Ratios ◽  
Strangeness Enhancement ◽  
Homogeneous Particle ◽  
Energy Formula

The production of pion, kaon and proton was measured in Pb–Pb collisions at nucleus–nucleus center-of-mass energy [Formula: see text] by the ALICE experiment at Large Hadron Collider (LHC). The particle ratios of these species compared to the RHIC measurements are confronted to the hadron resonance gas (HRG) model and to simulations based on the event generators PYTHIA 6.4.21 and HIJING 1.36. It is found that the homogeneous particle–antiparticle ratios (same species) are fully reproducible by means of HRG and partly by PYTHIA 6.4.21 and HIJING 1.36. The mixed kaon–pion and proton–pion ratios measured at RHIC and LHC energies seem to be reproducible by the HRG model. On the other hand, the strange abundances are underestimated in both event generators. This might be originated to strangeness suppression in the event generators and/or possible strangeness enhancement in the experimental data. It is apparent that the values of kaon–pion ratios are not sensitive to the huge increase of [Formula: see text] from 200 (RHIC) to 2760 GeV (LHC). We conclude that the ratios of produced particle at LHC seem not depending on the system size.

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