Modeling the strangeness content of hadronic matter

Abstract

The strangeness content of hadronic matter is studied in a string-flip model that reproduces various aspects of the QCD-inspired phenomenology, such as quark clustering at low density and color deconfinement at high density, while avoiding long range van der Waals forces. Hadronic matter is modeled in terms of its quark constituents by taking into account its internal flavor (u,d,s) and color (red, blue, green) degrees of freedom. Variational MonteCarlo simulations in three spatial dimensions are performed for the groundstate energy of the system. The onset of the transition to strange matter is found to be influenced by weak, yet not negligible, clustering correlations. The phase diagram of the system displays an interesting structure containing both continuous and discontinuous phase transitions. Strange matter is found to be absolutely stable in the model. 24.85.+p, 26.60.+c

Monte Carlo simulation of Tetraquark and Meson mixing in a dynamical model of the strong interaction

“…In addition, at high densities the quarks must behave like a free Fermi gas, and the transition between these two limits must be dynamically generated. The String-Flip Model [6,7] has these characteristics and was used to made this study.…”

Dynamical quark recombination in ultrarelativistic heavy-ion collisions and the proton-to-pion ratio

“…(12) is that the two functions to be evaluated (V and W ) are local; consequently, their expectation values can be calculated using Monte Carlo techniques, in particular we use the metropolis method to do the sampling. Finally, this procedure is carried out for different values of the particle density.…”

Dynamical heavy-quark recombination and the non-photonic single electron puzzle at RHIC

“…(11) and (12) for mesons and baryons respectively, and Φ F G (x 1 ,...,x N ) is the Fermi-gas wave function given by a product of Slater determinants, one for each color-flavor combination of quarks, which are built up of single-particle wave functions describing a free particle in a box [22]. The square of the variational wave function is the weighting probability in the sampling, which we carry out using metropolis algorithm.…”

“…We take the initial hadronization time as τ 0 = 1 fm, at an initial temperature T 0 = 200 MeV and the final hadronization temperature as T f = 100 MeV, corresponding, according to Eq. (22), to a final time τ f = 8 fm. Shown are the cases with v T = 0 and v T = 0.4.…”