THERMINATOR 2: THERMal heavy IoN generATOR 2

Abstract

We present an extended version of THERMINATOR, a Monte Carlo event generator dedicated to studies of the statistical production of particles in relativistic heavy-ion collisions. The increased functionality of the code contains the following features: The input of any shape of the freeze-out hypersurface and the expansion velocity field, including the 3+1 dimensional profiles, in particular those generated externally with various hydrodynamic codes. The hypersufraces may have variable thermal parameters, which allows for studies departing significantly from the mid-rapidity region, where the baryon chemical potential becomes large. We include a library of standard sets of hypersurfaces and velocity profiles describing the RHIC Au+Au data at sqrt(s_(NN)) = 200 GeV for various centralities, as well as those anticipated for the LHC Pb+Pb collisions at sqrt(s_(NN)) = 5.5 TeV. A separate code, FEMTO-THERMINATOR, is provided to carry out the analysis of femtoscopic correlations which are an important source of information concerning the size and expansion of the system. We also include several useful scripts that carry out auxiliary tasks, such as obtaining an estimate of the number of elastic collisions after the freeze-out, counting of particles flowing back into the fireball and violating causality (typically very few), or visualizing various results: the particle p_T-spectra, the elliptic flow coefficients, and the HBT correlation radii. We also investigate the problem of the back-flow of particles into the hydrodynamic region, as well as estimate the elastic rescattering in terms of trajectory crossings. The package is written in C++ and uses the CERN ROOT environment.

51 pages, 12 figures, 4 tables, project web-page: http://therminator2.ifj.edu.pl

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• Energy Dependence of High Moments for Net-proton Distributions
• Overview and Recent Results from BRAHMS
• Production of resonances in a thermal model: invariant-mass spectra and balance functions
• Characteristic form of boost-invariant and cylindrically non-symmetric hydrodynamic equations
• Interplay of the emission from thermal and direct sources in relativistic heavy ion collisions
• Interferometry radii in heavy-ion collisions at 200GeV and 2.76TeV
• Modelling Bose Einstein Correlations via Elementary Emitting Cells
• Particle Ratios and the QCD Critical Temperature
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• Strange particle production in a single-freeze-out model
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• Is HBT really puzzling?
• Statistical Ensembles With Finite Bath: A Description for an Event Generator
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• Three-Dimensional Two-Pion Emission Source at SPS: Extraction of Source Breakup Time and Emission Duration

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• Transverse momentum fluctuations in ultrarelativistic Pb+Pb and p+Pb collisions with wounded quarks
• Correlation coefficient between harmonic and transverse flow in heavy-ion collisions
• Fast resonance decays in nuclear collisions
• Bayesian parameter estimation for relativistic heavy-ion collisions
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• Effects of $\rho$-meson width on pion distributions in heavy-ion collisions
• Kaon-proton strong interaction at low relative momentum via femtoscopy in Pb-Pb collisions at the LHC
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• Techniques for multiboson interferometry
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