Rapidity window dependence of ridge correlations in the glasma

摘要

We study ridge correlations of the glasma in pp collisions at root s(NN) = 7 TeV by using the color glass condensate (CGC) formalism. The azimuthal collimation at long range rapidity is intrinsic to glasma dynamics and is reproduced here. When rapidity window enlarges, ridge correlations in two dimensional Delta y-Delta phi distribution and one dimensional Delta phi distribution at long range rapidity gap are enhanced. The enhancements are demonstrated to be the contributions of source gluons. The quantum evolution of the gluons presents unique correlation patterns in differential correlation function. These characters of two gluon correlations open a way of testing the production mechanism from experimental measurements.

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