New Model of Quark-Gluon Plasma Solves a Long-Standing Discrepancy Between Theory and Data Researchers from Japan provide a novel theoretical framework for describing the quark-gluon plasma, which agrees better with experimental data. The properties of quark-gluon plasma (QGP), the primordial f
Quark-gluon plasma is conventionally described using relativistic hydrodynamic models and studied experimentally through heavy-ion collisions. There has been a long-standing discrepancy between theory and experiment regarding the observation of particle yields in the low transverse momentum region and their absence in the model predictions. Now, researchers from Japan have addressed this issue, proposing a model that pins down the origin of the missing particle yields.
Against this backdrop, a team of researchers from Japan, led by theoretical physicist Professor Tetsufumi Hirano of Sophia University, undertook an investigation to account for the missing particle yields in the relativistic hydrodynamic models. In their recent work, they proposed a novel “dynamical core-corona initialization framework” to comprehensively describe high-energy nuclear collisions. Their findings were published in the journalon November 18, 2022, and involved contributions from Dr.
“We switched off the hadronic scatterings and performed only resonance decays to see a breakdown of the total yield into core and corona components, as hadronic scatterings mix up the two components in the late stage of reaction,” explains Dr. Kanakubo. Furthermore, results from full DCCI2 simulations showed better agreement with the ALICE experimental data compared when only core components with hadronic scatterings were compared. The corona contribution was found to be responsible for diluting the four-particle cumulants obtained purely from core contributions, indicating more permutations of particles with corona contribution.
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