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Initial State Correlations and the Ridge

Tolga Altinoluk
Nestor Armesto
Guillaume Beuf
Alex Kovner
Michael Lublinsky
We point out that Bose enhancement in a hadronic wave function generically leads to correlations between produced particles. We show explicitly, by calculating the projectile density matrix in the Color Glass Condensate approach to high-energy hadronic collisions, that the Bose enhancement of gluons in the projectile leads to azimuthal collimation of long range rapidity correlations of the produced particles, the so-called ridge correlations.
Date of publication: 
Published in: 
Acta Phys.Polon.Supp. 9 (2016) 479