  In the article, the fireball formed in the collision of relativistic nuclei
is considered as a quantum object. Based on this, an attempt is made to explain
the difference in the measurements of hyperon yields in the two experiments -
NA49 and NA57. Using the basic principles of quantum mechanics, it was shown
that a fireball can have two quantum states - with and without ignited
Quark-Gluon Plasma (QGP). With an increase of the collision energy of heavy
ions, the probability of QGP ignition increases. At the same time, the
probability of the formation of fireball without QGP ignition also remains
nonzero even at nuclear collision energies that are much higher than the
threshold QGP formation energy, which may be erroneously considered to be fixed
and which is intensively sought in modern heavy ion accelerators. Thus, at SPS
energy of heavy ion collisions \sqrt{s_{NN}} = 17.3 GeV, which is much higher
than the assumed threshold energy of QGP formation in the region around or
slightly above of \sqrt{s_{NN}} = 3 GeV, only half of the central collisions of
heavy ions bring to the formation of a fireball consisted of deconfined matter,
the remaining half of the collisions lead to the formation of a fireball from
only hadronic matter.
