Predictions for isobaric collisions at = 200 GeV from a multiphase transport model
Wei-Tian Deng🇨🇳 · Xu-Guang Huang🇨🇳 · Guo-Liang Ma🇨🇳 · Gang Wang🇺🇸
The isobaric collisions of Ru + Ru and Zr + Zr have recently been proposed to discern the charge separation signal of the chiral magnetic effect (CME). In this article, we employ the string melting version of a multiphase transport model to predict various charged-particle observables, including , spectra, elliptic flow (), and particularly possible CME signals in Ru + Ru and Zr + Zr collisions at = 200 GeV. Two sets of the nuclear structure parametrization have been explored, and the difference between the two isobaric collisions appears to be small, in terms of , spectra, and for charged particles. We mimic the CME by introducing an initial charge separation that is proportional to the magnetic field produced in the collision, and study how the final-state interactions affect the CME observables. The relative difference in the CME signal between the two isobaric collisions is found to be robust, insensitive to the final-state interactions.