Orateur
Description
High-energy nuclear collisions provide a unique site for the synthesis of both
nuclei and antinuclei at temperatures of kT ≈ 100 − 150 MeV. In these little
bangs of transient collisions, a quark-gluon plasma (QGP) of nearly vanishing
viscosity is created, which is believed to have existed in the early universe
within the first few microseconds after the Big Bang. Analyses of identified
particles produced in these little bangs based on the statistical hadronization
model for the QGP have suggested that light (anti)nuclei are produced from
the QGP as other hadrons and their abundances are little affected by later
hadronic dynamics. Here, we find a strong reduction of the triton yield by
about a factor of 1.8 in high-energy heavy-ion collisions based on a kinetic
approach that includes the effects of hadronic re-scatterings, particularly that
due to pion-catalyzed multi-body reactions. This finding is supported by the
latest experimental measurements and thus unveils the important role of
hadronic dynamics in the little-bang nucleosynthesis.
