Fine structures of azimuthal correlations of two gluons in the glasma

Abstract

We investigate the azimuthal correlations of the glasma in p-p collisions at √ sNN = 7 TeV by using the CGC formalism. As expected, the azimuthal correlations show two peaks at ∆φ = 0 and π which represent collimation production in CGC. Beyond that, azimuthal correlations show fine structures, i.e. bumps or shoulders between the two peaks, when at least one gluon has small x.The structures are demonstrated to be associated with saturation momentum, and likely appear at transverse momentum around 2Qsp = 1.8 GeV/c.

Methods for Derivation of Density Matrix of Arbitrary Multi-Mode Gaussian States from Its Phase Space Representation*

“…Then, by deriving the density matrix of each Gaussian state one by one and again using the linear combination, one can finally obtain the density matrix of the non-Gaussian state. [10−12] This method has been successfully applied to describe the quantum states generated in continuous variable entanglement distillation, [13] photon catalysis [14] and noiseless linear amplification. [15] Deriving the density matrix from the phase space is non-trivial and requires large amounts of calculation.…”