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Information × Registration Number 0219U100939, 0117U003428 , R & D reports Title Studying phase diagramm of strongly inetracting matter and its critical point in heavy ion collisions and lattice gluodynamics popup.stage_title Head Bugaev Kyrylo O., Доктор фізико-математичних наук Registration Date 05-04-2019 Organization Bogolybov Institute for Theoretical Physics of NASU popup.description2  To construct the realistic equation of state of hadronic matter which correctly reproduces the 2-nd, 3-rd, and 4-th virial coefficients, we developed a novel version of the hadron resonance gas model (HRGM) with the surface tension coefficient which is induced by the inter- particle interaction in the thermal medium. In order to find out the region of its applicability, the speed of sound Сs was calculated. It is shown that the new HRGM obeys the inequality Сs < 1 in an essentially wider range of baryonic charge density than the other models do which are used to describe the hadronic matter properties. Studies of the compressibility coefficient Z within the new HRGM showed that, in contrast to all other versions of HRGM, its wide applicability range allows us to describe the experimental data of hadron yields which are measured in heavy ion collisions in the whole interval of center-of-mass collision energy, i.e. from √s = 2.7 GеV/nucl. (AGS BNL) to √s = 2.76 TеV/nucl. (LHC CERN) with high confidence and with the quality chi^2/dof = 64.8/60 = 1.08 . The parameters of such a model are fixed, and it is confirmed an existence of all irregularities which we previously found at chemical freeze-out curve. At the collision energies √s = 4.9 GеV/nucl. and √s = 9.2 GеV/nucl., which coincide with the ones of strongly correlated plateau in the behavior of various observables at the chemical freeze-out curve, we found new irregularities among which the most interesting ones are two peaks of the dimensionless interaction measure δ = (ε - p)/T^4 and two peaks of the baryon charge densityт. Here T is the temperature, ε is the energy density, and p is the pressure at chemical freeze-out. Product Description popup.authors Ivanytskyi Oleksii I. Bugaev Kyrylo O. Oliinychenko Dmytro R. Sagun Violetta V. popup.nrat_date 2020-04-02 Close