The Momentum-Kick Model can fit the near-side ridge in high-multiplicity pp collisions at 13 and 7 TeV, with multiplicity-dependent parameters and a speculative 14 TeV prediction.
High p_T Triggered Delta-eta,Delta-phi Correlations over a Broad Range in Delta-eta
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abstract
The first measurement of pseudorapidity (Delta-eta) and azimuthal angle (Delta-phi) correlations between high transverse momentum charged hadrons (p_T > 2.5 GeV/c) and all associated particles is presented at both short- (small Delta-eta) and long-range (large Delta-eta) over a continuous pseudorapidity acceptance (-4<Delta-eta<2). In these proceedings, the various near- and away-side features of the correlation structure are discussed as a function of centrality in Au+Au collisions measured by PHOBOS at sqrt(s_NN)=200 GeV. In particular, this measurement allows a much more complete determination of the longitudinal extent of the ridge structure, first observed by the STAR collaboration over a limited eta range. In central collisions the ridge persists to at least Delta-eta=4, diminishing in magnitude as collisions become more peripheral until it disappears around Npart=80.
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Analysis of the near-side ridge structure in pp collisions via Momentum-Kick Model
The Momentum-Kick Model can fit the near-side ridge in high-multiplicity pp collisions at 13 and 7 TeV, with multiplicity-dependent parameters and a speculative 14 TeV prediction.