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Longitudinal fluctuations of the center of mass of the participants in heavy-ion collisions
A model for computing the probability density of event-by-event participant center-of-mass rapidity ${y}^{\mathrm{c}.\mathrm{m}.}$ is presented. The evaluations of the ${y}^{\mathrm{c}.\mathrm{m}.}$ distribution are performed for different collision energies and different centralities. We show that for certain conditions the rapidity distribution is described by a Gaussian with a variance determined mostly by …