Abstract
It is shown that the anomalous sharp increasing of the strength of the near-side ridge structures observed in Au-Au collisions at s=62 GeV and s=200 GeV and the onset of the ridge structure in pPb and in pp collisions can be naturally explained in the framework of string percolation. In all the cases the near-side strength reflects the collision area covered by the strings stretched between the colliding objects and therefore it is related to the shape of their profile functions. The dependence of the pseudorapidty and azimuthal widths on multiplicty and energy is qualitatively explained.
Highlights
INTRODUCTIONHadron Collider (LHC) energies [7]
Ion Collider (RHIC) [1,2,3,4,5,6] and later at the CERN LargeHadron Collider (LHC) energies [7]
These ridge-like correla√tions have been seen in proton-proton collisions at s = 7 TeV for high multiplicity events [8]
Summary
Hadron Collider (LHC) energies [7] These ridge-like correla√tions have been seen in proton-proton collisions at s = 7 TeV for high multiplicity events [8]. As the number of strings formed in a collision reaches an universal critical density, a macroscopic cluster of strings appears covering around 2/3 of the total collision area [29]. The dependence of the strength of the near-side ridge on the multiplicity in a given collision reflects the fraction of the collision area covered by strings which is related to the profile function of the colliding objects.
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