  We calculate eccentricities in high energy proton-nucleus collisions, by
calculating correlation functions of the energy density field of the Glasma
immediately after the collision event at proper time tau = 0. We separately
consider the effects of color charge and geometrical hot spot fluctuations,
analytically performing the averages over both in a dilute-dense limit. We show
that geometric fluctuations of hot spots inside the proton are the dominant
source of eccentricity whereas color charge fluctuations only give a negligible
correction. The size and number of hot spots are the most important parameters
characterizing the eccentricities.
