Ridge from Strings

Abstract

In the colour string picture with fusion and percolation it is shown that long range azimuthal-rapidity correlations (ridge) can arise from the superposition of many events with exchange of clusters of different number of strings and not from a single event. Relation of the ridge with the flow harmonics coefficients is derived. By direct Monte-Carlo simulations, in the technique previously used to calculate these coefficients, ridge correlations are calculated for AA, pA and pp collisions. The azimuthal anisotropy follows from the assumed quenching of the emitted particles in the strong colour fields inside string clusters. It is confirmed that in pp collisions the ridge structure only appears in rare events with abnormally high multiplicity. Comarison with the experimental data shows a good agreement. Also a good agreement is found for pPb collisions. For AA collisions a reasonable agreement is found for both near-side and away-side angular correlations although it worsens at intermediate angles.

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Cited by in corpus (12)

• Collectivity without plasma in hadronic collisions
• Strongly intensive observable between multiplicities in two acceptance windows in a string model
• Di-photon "Ridge" in p+p and p+A collisions at RHIC and the LHC
• Deconfinement and degrees of freedom in $pp$ and $A-A$ collisions at LHC energies
• Soft and hard scales of the transverse momentum distribution in the Color String Percolation Model
• Energy loss as the origin of an universal scaling law of the elliptic flow
• $p_t$- dependence of the flow coefficients for pp collisions in the color string scenario. Monte-Carlo simulations
• Understanding long-range near-side ridge correlations in p$-$p collisions using rope hadronization at LHC energies
• Elliptic and triangular flows in dAu collisions at 200 GeV in the fusing color string model
• Dual Parton Model for the Charged Multiplicity in pp Collisions at 13, 13.6 TeV and for future LHC energy of 27 TeV
• Azimuthal flow in hadron collisions from quark-gluon string repulsion
• Flow coefficients in O-O Al-Al and Cu-Cu collisions at 200 GeV in the fusing color string model