Recent signals of two QCD phase transitions in heavy ion collisions in the NICA-FAIR energy range of collisions
Семинары
Cеминар «Теория адронного вещества при экстремальных условиях»
Дата и время: среда, 24 июля 2019 г., в 16:00
Место: Конференц-зал им. Блохинцева (4-й этаж), Лаборатория теоретической физики им. Н.Н. Боголюбова
Тема семинара: «Recent signals of two QCD phase transitions in heavy ion collisions in the NICA-FAIR energy range of collisions»
Докладчик: К. А. Бугаев (Институт теоретической физики им. Боголюбова, Киев)
Аннотация:
During last few years two groups based on many irregularities and possible signals independently suggested that the 1-st order phase transition of chiral symmetry restoration in hadronic phase may occur in the central nuclear collisions at the center-of-mass energies 3.8–4.9 GeV, while a weaker deconfinement phase transition of 2-nd order may be reached at the center-of-mass collision energies 9-10 GeV. Later on the third group studying the fluctuations of light nuclei concluded that the center-of-mass collision energy 8.8 GeV may be the nearest vicinity of the critical endpoint of QCD matter phase diagram. Hence in this talk I will present the most striking signals of two QCD phase transitions which are deduced from the existing experimental data. Based on a recent analysis of the data description quality factor of 10 existing event generators of nucleus-nucleus collisions in the range of center of mass collision energies from 2.1 GeV to 17.3 GeV I will present the arguments which provide an independent evidence that two QCD phase transitions occur at the center-of-mass energies 3.8–4.9 GeV and 9-11 GeV. The prospects for detecting these phase transitions at NICA-FAIR energy range will be discussed as well.