We extend previous results from the preceding paper on factorization in high energy nucleus-nucleus collisions by computing the inclusive multigluon spectrum to next-to-leading order. The factorization formula is strictly valid for multigluon emission in a slice of rapidity of width $\Delta Y\le {\alpha }_s^{-1}$. Our results shows that often neglected disconnected graphs dominate the inclusive multigluon spectrum, and are crucial in order to achieve factorization for this quantity. These results provide a dynamical framework for the Glasma flux tube picture of the striking “ridge”-like correlation seen in heavy ion collisions.

• Received 28 July 2008

DOI:https://doi.org/10.1103/PhysRevD.78.054020