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Multiplicity fluctuations at midrapidity in p+p collisions at high energiesare described by a negative binomial distribution and exhibit approximateKoba-Nielsen-Olesen (KNO) scaling. We find that these KNO fluctuations areimportant also for reproducing the multiplicity distribution in d+Au collisionsobserved at RHIC, adding to the Glauber fluctuations of the number of binarycollisions or participants. We predict that the multiplicity distribution inp+Pb collisions at the LHC also deviates little from the KNO scaling function.Finally, we analyze various moments of the eccentricity of the particleproduction zone in A+A collisions at RHIC and LHC and find that particleproduction fluctuations increase fluctuation dominated moments such as thetriangularity epsilon_3 substantially.

KNO scaling of fluctuations in pp and pA, and eccentricities in heavy-ion collisions