Ridges in p-A (and pp) collisions

Abstract

Correlations between particles separated by several units of pseudorapidity were discovered in high-multiplicity pp and p-Pb collisions at the LHC. These long-range structures observed in two-particle correlation functions are reminiscent of features seen in Pb-Pb collisions, where they are often viewed as a signature of collective behavior and the formation of a quark-gluon plasma (QGP). Therefore, the discovery of these `ridges' in small systems has implications for the study of collectivity in small systems as well as in heavy-ion collisions. The ridges in pp and p-Pb collisions have been studied in the ALICE, ATLAS, CMS, and LHCb experiments to characterize the $p_{\mathrm{T}}$-, $\eta$-, and multiplicity-dependences of the ridge yield, as well as its particle composition.

Proceedings of the 3rd Large Hadron Collider Physics Conference (LHCP 2015), August 31 - September 5 2015

References in corpus (4)

• Observation of long-range near-side angular correlations in proton-lead collisions at the LHC
• Evidence for collective multi-particle correlations in pPb collisions
• Long-range two-particle correlations of strange hadrons with charged particles in pPb and PbPb collisions at LHC energies
• Multiplicity dependence of jet-like two-particle correlations in p-Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV