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Azimuthal collimation of long range rapidity correlations by strong color fields in high multiplicity hadron-hadron collisions

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arxiv 1201.2658 v2 pith:WFKQEQRB submitted 2012-01-12 hep-ph nucl-th

classification hep-phnucl-th
keywords collisionsmultiplicityazimuthalcollimationcolorcorrelationsdi-hadronflow
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The azimuthal collimation of di-hadrons with large rapidity separations in high multiplicity p+p collisions at the LHC is described in the Color Glass Condensate (CGC) effective theory [1] by N_c^2 suppressed multi-ladder QCD diagrams that are enhanced \alpha_S^(-8) due to gluon saturation in hadron wavefunctions. We show that quantitative computations in the CGC framework are in good agreement with data from the CMS experiment on per trigger di-hadron yields and predict further systematics of these yields with varying trigger pT and charged hadron multiplicity. Radial flow generated by re-scattering is strongly limited by the structure of the p+p di-hadron correlations. In contrast, radial flow explains the systematics of identical measurements in heavy ion collisions.

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  1. Hybrid Color Glass Condensate and hydrodynamic description of the Relativistic Heavy Ion Collider small system scan

    nucl-th 2019-08 conditional novelty 6.0 of 10

    A hybrid IP-Glasma and hydrodynamics calculation finds that final-state interactions are required for the RHIC small-system flow data, while the initial CGC momentum anisotropy contributes visibly at low multiplicity.

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