Based on the fact that the mass difference between the chiral partners is an order parameter of chiral phase transition and that the chiral order parameter reduces substantially at the chemical freeze-out point in ultra-relativistic heavy ion collisions, we argue that the production ratio of K1 over K⁎ in such collisions should be substantially larger than that predicted in the statistical hadronization model. We further show that while the enhancement effect might be contaminated by the relatively larger decrease of K1 meson than K⁎ meson during the hadronic phase, the signal will be visible through a systematic study on centrality as the kinetic freeze-out temperature is higher and the hadronic life time shorter in peripheral collisions than in central collisions.
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - 2021 Aug 10|
Bibliographical noteFunding Information:
This work was supported by Samsung Science and Technology Foundation under Project Number SSTF-BA1901-04 . S. Lim acknowledges support from the National Research Foundation of Korea (NRF) grant funded by the Korea government ( MSIT ) under Contract No. NRF-2008-00458 . S. Cho was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government ( MSIT ) (No. 2019R1A2C1087107 ).
© 2021 The Authors
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics