Speaker
Description
The effect of intrinsic fluctuations of the proton saturation momentum scale on event-by-event rapidity distributions is discussed. Saturation scale fluctuations generate an asymmetry in the single particle rapidity distribution in each event resulting in genuine $n$-particle correlations having a component linear in the rapidities of the produced particles, $y_1 \cdots y_n$. We introduce a color domain model that naturally explains the centrality dependence of the two-particle rapidity correlations recently measured by ATLAS, while constraining the probability distribution of saturation scale fluctuations in the proton. Predictions for $n=4, 6$ and $8$ particle rapidity correlations find that the four- and eight-particle cumulant change sign at an intermediate multiplicity, a signature which could be tested experimentally.
