Clustering structure effect on Hanbury-Brown–Twiss correlation in $$^{12}\hbox {C} {+^{197}}\hbox {Au}$$ collisions at 200 GeV

Abstract

Through 12 C + 197 Au collisions at √ sNN = 200 GeV using a multiphase transport (AMPT) model, the azimuthal angle dependences of the Hanbury Brown-Twiss (HBT) radii relative to the second-and third-order participant plane from π-π correlations are discussed. Three initial geometric configurations of 12 C, namely three-α-cluster triangle, three-α-cluster chain and Woods-Saxon distribution of nucleons, are taken into account, and their effects on the correlations are investigated. The ratio of the third-to the second-order HBT radii R 2 o(s),3 /R 2 o(s),2 is shown to be a clear probe for three configurations. In addition, this work presents the hadronic rescattering time evolution of the azimuthally dependent HBT radii. From the present study, one can learn that the HBT correlation from identical particles at freeze-out is able to provide the information of different initial configurations as collective flow proposed before.

System size dependence of baryon-strangeness correlations in relativistic heavy ion collisions from a multiphase transport model

“…Finally, we investigated the possible effect of αclustering structure of light nuclei on the correlation coefficient C BS . Some previous works proposed the signatures of α-clustering structure in light nuclei could be observed via heavy-ion collisions at ultra-relativistic energies [32,[58][59][60][61][62][63][64][65][66]. In this context, we examined the influence of the fluctuation of initial nuclear geometry structure on the correlation coefficient C BS .…”

Short range correlations in the extended quantum molecular dynamics model

“…[31][32][33]. Furthermore, the predicted α-cluster structure has been successfully taken as an input for the studies of ultra-relativistic heavy-ion collisions [34][35][36][37][38][39]. Some other developments, such as quasi-deuteron photonuclear reaction [40][41][42] as well as hard photon production channel [43,44] have been also presented based on the EQMD model in our previous work.…”

Machine-learning-based identification for initial clustering structure in relativistic heavy-ion collisions

“…It can be expected that the shape of the created fireball in the transverse plane reflects the initial geometry of the light nucleus, because the interaction time is short enough to prevent the much slower nuclear excitation at ultrahigh collision energies. In our previous works, we investigated initial geometry effects on elliptic and triangular flows and their fluctuations, Hanbury Brown-Twiss (HBT) correlations as well as electromagnetic fields in 12 C + 197 Au collisions [22][23][24][25][26][27][28]. It turns out that the difference of the second-order and third-order anisotropy could be clearly observed among spherical structure, clustered triangle and clustered chain.…”