The ridge in proton-proton collisions at the LHC

Abstract

We show that the key features of the CMS result on the ridge correlation seen for high multiplicity events in sqrt(s)=7TeV proton-proton collisions at the LHC can be understood in the Color Glass Condensate framework of high energy QCD. The same formalism underlies the explanation of the ridge events seen in A+A collisions at RHIC, albeit it is likely that flow effects may enhance the magnitude of the signal in the latter.

arXiv comment6 pages, 7 figures, ReVTEX4; v2: modified fig.5 to indicate momentum flow, added references

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