K1/K enhancement as a signature of chiral symmetry restoration in heavy ion collisions

Hae Som Sung, Sungtae Cho, Juhee Hong, Su Houng Lee, Sanghoon Lim, Taesoo Song

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1 Citation (Scopus)


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.

Original languageEnglish
Article number136388
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publication statusPublished - 2021 Aug 10

Bibliographical note

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© 2021 The Authors

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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