Search for a signal on QCD critical point in central nucleusnucleus collisions

Abstract

We discuss that the QCD critical point could appear in central collisions in percolation cluster. We suggest to use the effects of nuclear transparency and that of the light nuclear production to identify the critical point.

Study of <sup>12</sup>CC Collisions at 4.5 A GeV to Define Centrality

“…These experiments indicate the regime change at some values of the centrality as some critical phenomena. If the regime change observed in the different experiments takes place unambiguously twice, this would be the most direct experimental evidence to a phase transition from hadronic matter to a phase of deconfined quarks and gluons [1][2][3][4][5][6][7]. After point of regime change the saturation is observed.…”

“…The creation of new phases of strongly interacting matter is the most interesting area of research for physicist for last many years. Physicists are interested in studying characteristics of newly formatting matter under extreme conditions [1][2][3][4][5][6][7]. One way to create these new phases is the heavy ion collision at relativistic and ultra relativistic energies.…”

“…To trace anticipated order of the phase evolution, for example, with increase of the baryon density, one analyses various characteristics of particle production at nuclear-nuclear collisions depending on the centrality of collisions [8][9][10][11][12][13]. However, there is an ongoing discussion about how to define the centrality experimentally [1][2][3][4][5][6][7][8][9][10][11][12][13]. For instance, in various experiments the centrality is defined as a number of protons, projectile and target fragments, slow particles, all particles, as the energy flow of the particles with emission angles equal 0˚ or 90˚, etc.…”

“…For instance, in various experiments the centrality is defined as a number of protons, projectile and target fragments, slow particles, all particles, as the energy flow of the particles with emission angles equal 0˚ or 90˚, etc. [1][2][3][4][5][6][7][8][9][10]. Among the most popular approaches, based on geometrical picture, is a Glauber modeling which contains some theoretical approximations [14].…”

SEARCHING FOR THE PROPERTIES OF NUCLEAR MATTER USING PROTON–CARBON AND DEUTERON–CARBON COLLISIONS AT 4.2A GeV/c

“…That gives substantial and clear signature for the increase in the NT in most of the cases. The critical change in the NT is considered as an important effect to get the information on particular properties of strongly interacting matter as well as the Quark Gluon Plasma (QGP) [21,22].…”