Space-time structure of the pion emission in central Au+Au collisions at RHIC energiesстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 4 августа 2021 г.
Аннотация:The spatial and temporal properties of pion emission in 0%–5% central Au+Au collisions at $\sqrt{{s}_{{NN}}}=11.5$, 14.5 GeV, and 19.6 GeV were investigated using the UrQMD model. The three-dimensional femtoscopic radii, Rout, Rside, and Rlong, were extracted for several regions of pair transverse momentum. Times of maximum emission, ${\tau }_{m.e.}$, were extracted from the fit to Rlong with the assumptions of the absence and presence of the transverse flow and compared to each other. In addition, the ${\tau }_{m.e.}$ was estimated directly from the single-particle emission function at kinetic freeze-out. The two methods provide consistent results at the considered energies.