We study the K∗ meson reduction in heavy-ion collisions by focusing on the hadronic effects on the K∗ meson abundance. We evaluate the absorption cross sections of the K∗ and K meson by light mesons 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 how the interplay between the interaction of the K∗ meson and kaon with light mesons in the hadronic medium determines the final yield difference of the statistical hadronization model to the experimental measurements. For the central Au+Au collision at sNN=200 GeV, we find that the K∗/K yield ratio at chemical freeze-out decreases by 37% during the expansion of the hadronic matter, resulting in the final ratio comparable to STAR measurements of 0.23 ±0.05.
Bibliographical noteFunding Information:
S.C. was supported by a 2015 Research Grant from Kangwon National University and a National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. 2016R1C1B1016270). S.H.L. was supported by the Korean ministry of education under the Grant No. 2016R1D1A1B03930089.
© 2018 American Physical Society.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics