Marek Gaździcki (born 9 June 1956) is a Polish high-energy nuclear physicist, and the initiator and spokesperson of the NA61/SHINE experiment at the CERN Super Proton Synchrotron (SPS).

[2] These predictions have been confirmed by the NA49 experiment at the CERN SPS within the energy scan programme which was started by him and Peter Seyboth.

After completing his first scientific degree, he married Maria Magdalena Klink, a computer scientist, who graduated from the Warsaw University of Technology.

Here, a first observation of the enhancement of strange hadron production in A+A collisions at the SPS energies constituted the cardinal outcome of this experiment.

Based upon these testings, Gaździcki observed the anomaly in energy dependence of pion and strange hadron yields in A+A collisions.

[10] Lastly, along with Mark Gorenstein, he formulated the statistical model of the early stage which is a basis for the quantitative description of the observed effects,[2] and further predictions concerning the threshold for the quark–gluon plasma production.

The principal goals of this experiment are: the search of the critical point of strongly interacting matter, the study of the properties of the onset of deconfinement in nucleus-nucleus collisions and precision measurements of hadron production in nuclear interactions for neutrino (T2K) and cosmic-ray (Pierre Auger Observatory and KASCADE) experiments.