Comparing the same-side "ridge" in CMS p-p angular correlations to RHIC p-p data

Abstract

The CMS collaboration has recently reported the appearance of a same-side "ridge" structure in two-particle angular correlations from 7 TeV p-p collisions. The ridge in p-p collisions at 7 TeV has been compared to a ridge structure in more-central Au-Au collisions at 0.2 TeV interpreted by some as evidence for a dense, flowing QCD medium. In this study we make a detailed comparison between 0.2 TeV p-p correlations and the CMS results. We find that 7 TeV minimum-bias jet correlations are remarkably similar to those at 0.2 TeV, even to the details of the same-side peak geometry. Extrapolation of azimuth quadrupole systematics from 0.2 TeV suggests that the same-side ridge at 7 TeV is a manifestation of the azimuth quadrupole with amplitude enhanced by applied cuts.

9 pages, 4 figures, response to referee comments

References in corpus (9)

• Observation of Long-Range Near-Side Angular Correlations in Proton-Proton Collisions at the LHC
• On the Strongly-Interacting Low-Viscosity Matter Created in Relativistic Nuclear Collisions
• Hydrodynamic Models for Heavy Ion Collisions
• The multiplicity dependence of inclusive $p_t$ spectra from p-p collisions at $\sqrt{s}$ = 200 GeV
• Evolution of minimum-bias parton fragmentation in nuclear collisions
• Centrality evolution of $p_t$ and $y_t$ spectra from Au-Au collisions at $\sqrt{s_{NN}}=200$ GeV
• Parton fragment yields derived from minimum-bias jet angular correlations
• The RHIC azimuth quadrupole: "perfect liquid" or gluonic radiation?
• Azimuth Quadrupole Systematics in Au-Au Collisions

Cited by in corpus (11)

• Anomalous centrality evolution of two-particle angular correlations from Au-Au collisions at $\sqrt{s_{\mathrm{NN}}}$ = 62 and 200 GeV
• CCharge-multiplicity dependence of single-particle transverse-rapidity ${\mathbf{y}}_{\mathbf{t}}$ and pseudorapidity $\eta$ densities and 2D angular correlations from 200 GeV $p$-$p$ collisions
• Hyperon/meson ratios in rare high-multiplicity $pp$ collisions at energies available at the Large Hadron Collider, and potential signatures for mini-quark-gluon plasma formation
• CMS ridge effect at LHC as a manifestation of bremstralung of gluons due to the quark-anti-quark string formation
• On correlations in high-energy hadronic processes and the CMS ridge: A manifestation of quantum entanglement?
• Measurement of emission angle anisotropy via long-range angular correlations with high $p_T$ hadrons in $d$$+$Au and $p$$+$$p$ collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Signature of the Fragmentation of a Color Flux Tube
• Azimuthal quadrupole correlation from gluon interference in 200 GeV and 7 TeV p+p collisions
• Event-by-Event Study of Space-Time Dynamics in Flux-Tube Fragmentation
• $\mathbf{p}$-$\mathbf{p}$ minimum-bias dijets and nonjet quadrupole in relation to conjectured collectivity (flows) in high-energy nuclear collisions
• Rescuing the nonjet (NJ) azimuth quadrupole from the flow narrative