The MICOR model

The MIcroscopical COalescence Rehadronization model describes the creation of particles in 2->1 coalescence processes:

Meson resonances (1 spin: ω, ρ, K^*, φ) from quarks (u, d, s) and antiquarks.
Baryon resonances (3/2 spin: Δ, Σ^*, Ξ^*, Ω) from diquarks and quarks.
Antibaryon resonances from antidiquarks and antiquarks.
Diquarks are created like the mesons, but from two quarks. The coalescence factor of diquark creation is twice the coalescence factor for the corresponding meson. The factor 2 comes from the colors (diquarks are colorful, mesons are colorless).
Lower mass hadrons (protons, pions, etc.) cannot be created in the coalescence model because quarks have (large) constituent quark masses. These hadrons are produced later, when the resonances decay. In the original version of MICOR, decays were simulated using the JETSET event generator. In later versions, GROMIT is used as a hadronic cascade for the simulation of final state interactions.

MICOR has a relatively small number of model parameters; the two main parameters are the quark matter temperature and the transverse flow velocity. See also the summary of my PhD thesis.

GROMIT is a general particle cascade program written in C++. It was developed by members of the RHIC Transport Theory Collaboration (RTTC): Péter Csizmadia, Stephen E. Vance, Yasushi Nara, Sen Cheng, Scott Pratt, Dénes Molnár. The source is freely available (see the license): gromit-0.3.1.tar.lzma (updated: Nov 16 2008).

MICOR related papers GROMIT papers

P. Csizmadia, P. Lévai, S. E. Vance, T. S. Biró, M. Gyulassy, J. Zimányi: Strange hyperon and antihyperon production from quark and string-rope matter, Journal of Physics G25 (1999) 321; Proc. of Int. Conference on Strangeness in Quark Matter, July 20-24, 1998, Padova, Italy [hep-ph/9809456]

P. Csizmadia, P. Lévai: φ, Ω and ρ production from deconfined matter in relativistic heavy ion collisions at CERN SPS, Physical Review C61 (2000) 031903 [hep-ph/9909544]

P. Csizmadia, P. Lévai D and J/ψ production from deconfined matter in relativistic heavy ion collisions [hep-ph/0008195]

P. Lévai, T. S. Biró, P. Csizmadia, T. Csörgõ, J. Zimányi: The production of charm mesons from quark matter at CERN SPS and RHIC, Journal of Physics G27 (2001) 703 [nucl-th/0011023]

S. Cheng, S. Pratt, P. Csizmadia, Y. Nara, D. Molnár, M. Gyulassy, S. E. Vance, B. Zhang: The effect of finite-range interactions in classical transport theory Physical Review C65 (2002) 024901 [nucl-th/0107001]

Y. Nara, S.E. Vance, P. Csizmadia: A study of parton energy loss in Au+Au collisions at RHIC using transport theory, Physics Letters B531 (2002) 209-215 [nucl-th/0109018]

P. Csizmadia and P. Lévai, The MICOR hadronization model with final state interactions, Journal of Physics G28 (2002) 1997-2000 [nucl-th/0011023]

P. Csizmadia and P. Lévai, Energy dependence of transverse quark flow in heavy ion collisions, Submitted to Acta Phys.Hung. [nucl-th/0407054]