We study the hadronic effects on the ccqq tetraquark state by focusing on the Tcc(1+) meson during the hadronic stage of relativistic heavy ion collisions. We evaluate the absorption cross section of the Tcc meson by pions in the quasifree approximation, and investigate the time evolution of the Tcc abundance in the hadronic medium based on the effective volume and temperature of the hadronic phase at both the BNL Relativistic Heavy Ion Collider (RHIC) and the CERN Large Hadron Collider (LHC) modeled by hydrodynamic calculations with the lattice equation of state. We probe two possible scenarios for the structure of the Tcc, where it is assumed to be either a compact multiquark state or a larger sized molecular configuration composed of DD∗. Our numerical results suggest that the hadronic effects on the Tcc production are insignificant, and its final abundance depends on the initial yield of the Tcc produced from the quark-gluon plasma phase, which will depend on the assumed structure of the state.
Bibliographical noteFunding Information:
This work was supported by the Korea National Research Foundation under Grant No. 2016R1D1A1B03930089, by a National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. 2016R1C1B1016270), and by a National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2018R1C1B6008119).
© 2018 American Physical Society.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics