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We evaluate the third- and fourth-order baryon, charge and strangenesssusceptibilities near a chiral critical point using the Nambu-Jona-Lasiniomodel. We identify robust qualitative behaviours of the susceptibilities alonghypothetical freeze-out lines that agree with previous model studies.Quantitatively, baryon number fluctuations are the largest in magnitude andthus offer the strongest signal when freeze-out occurs farther away from acritical point. Charge and strangeness susceptibilities also diverge at acritical point, but the area where the divergence dominates is smaller, meaningfreeze-out must occur closer to a critical point for a signal to be visible inthese observables. In case of strangeness, this is attributable to therelatively large strange quark mass. Plotting the third- and fourth-ordersusceptibilities against each other along the freeze-out line exhibits clearlytheir non-montonicity and robust features.

Robust characteristics of nongaussian fluctuations from the NJL model