System-size dependence of the charged-particle pseudorapidity density at sNN=5.02TeV for pp, p Pb, and Pb Pb collisions
Physics Letters B, ISSN: 0370-2693, Vol: 845, Page: 137730
2023
- 2Citations
- 11Captures
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Metrics Details
- Citations2
- Citation Indexes2
- CrossRef2
- Captures11
- Readers11
- 11
Article Description
We present the first systematic comparison of the charged-particle pseudorapidity densities for three widely different collision systems, pp, p Pb, and Pb Pb, at the top energy of the Large Hadron Collider ( sNN=5.02TeV ) measured over a wide pseudorapidity range ( −3.5<η<5 ), the widest possible among the four experiments at that facility. The systematic uncertainties are minimised since the measurements are recorded by the same experimental apparatus (ALICE). The distributions for p Pb and Pb Pb collisions are determined as a function of the centrality of the collisions, while results from pp collisions are reported for inelastic events with at least one charged particle at midrapidity. The charged-particle pseudorapidity densities are, under simple and robust assumptions, transformed to charged-particle rapidity densities. This allows for the calculation and the presentation of the evolution of the width of the rapidity distributions and of a lower bound on the Bjorken energy density, as a function of the number of participants in all three collision systems. We find a decreasing width of the particle production, and roughly a smooth ten fold increase in the energy density, as the system size grows, which is consistent with a gradually higher dense phase of matter.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0370269323000643; http://dx.doi.org/10.1016/j.physletb.2023.137730; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85172692647&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0370269323000643; https://dx.doi.org/10.1016/j.physletb.2023.137730
Elsevier BV
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