Abstract
Recent work on the particle composition (hadrochemistry) of the final state in proton-proton (p-p), proton-lead (p-Pb) and lead-lead (Pb-Pb) collisions as a function of the charged particle multiplicity (dNch/dη) is reviewed. It is argued that for high multiplicities (at least about 20 charged hadrons in the mid-rapidity interva) consistent results are obtained in the thermal model.
Highlights
Collider (LHC) is characterized by [1] a total of about 30 000 particles are produced as can be seen from figure 1
The final state produced in a large number of hadrons
In this paper we have investigated three different ensembles to analyze the variation of particle yields with t√he multiplicity of charged particles produced in proton-proton collisions at the center-of-mass energy of s = 7 TeV [31], p-Pb collisions at 5.02 TeV [32, 33] and Pb-Pb collisions at 2.76 TeV [34, 35, 36]
Summary
The final state produced in a large number of hadrons. Collider (LHC) is characterized by [1] a total of about 30 000 particles are produced as can be seen from figure 1. The highest values are obtained using the canonical ensemble with exact conservation of three quantum numbers, baryon number B, strangeness S and charge Q, all of them being set to zero as is appropriate for the central rapidity region in p-p collisions at 7 TeV. In this ensemble the temperature drops strongly from the lowest to the highest multiplicity. The three lines corresponding to the fits are often very close to each other and overlap, they are not always visible on the figures
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