Speaker
Sungtae Cho
(Kangwon National University)
Description
We investigate the variation of the $K^*$ meson abundance in heavy ion collisions by focusing on the hadronic effects on the $K^*$ meson abundance. We evaluate the absorption cross section of the $K^*$ meson as well as that of kaon in the hadronic matter, and further investigate
the variation in the meson abundances for both particles during
the hadronic stage of heavy ion collisions. We show that the
interplay between the interaction of the $K^*$ meson with light
mesons in the hadronic medium and that of the kaon determines the
final yield difference of the statistical hadronization model to
the experimental measurements. For the central Au+Au collision at
$\sqrt{s_{NN}}=200$ GeV, we find that the $K^*/K$ yield ratio at
chemical freeze-out decreases by $32\%$ during the expansion of
the hadronic matter, resulting in the final ratio comparable to
STAR measurements of 0.23 $\pm0.05$.
Author
Sungtae Cho
(Kangwon National University)
Co-author
Su Houng Lee
(Yonsei University)
