Possible multiparticle ridge-like correlations in very high multiplicity proton-proton collisions

Abstract

The CMS collaboration at the LHC has reported a remarkable and unexpected phenomenon in very high-multiplicity high energy proton-proton collisions: a positive correlation between two particles produced at similar azimuthal angles, spanning a large range in rapidity. We suggest that this "ridge"-like correlation may be a reflection of the rare events generated by the collision of aligned flux tubes connecting the valence quarks in the wave functions of the colliding protons. The "spray" of particles resulting from the approximate line source produced in such inelastic collisions then gives rise to events with a strong correlation between particles produced over a large range of both positive and negative rapidity. We suggest an additional variable that is sensitive to such a line source which is related to a commonly used measure, ellipticity.

Updated figure. Version to be published in Physics Letters B

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• Hadronic Spectra and Light-Front Wavefunctions in Holographic QCD
• The ridge in proton-proton collisions at the LHC
• Elliptic flow in proton-proton collisions at 7 TeV
• The quark-gluon medium
• Multiplicity Distribution of Secondary Hadrons at LHC Energy and Total Cross Sections of Hadron-Hadron Interactions

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