Please use this identifier to cite or link to this item:
|Title:||Matching stages of heavy-ion collision models|
Csernai, L. P.
Magas, V. K.
Schlei, B. R.
Col·lisions (Física nuclear)
Col·lisions d'ions pesats
Collisions (Nuclear physics)
Heavy ion collision
|Publisher:||American Physical Society|
|Abstract:||Heavy-ion reactions and other collective dynamical processes are frequently described by different theoretical approaches for the different stages of the process, like initial equilibration stage, intermediate locally equilibrated fluid dynamical stage, and final freeze-out stage. For the last stage, the best known is the Cooper-Frye description used to generate the phase space distribution of emitted, noninteracting particles from a fluid dynamical expansion or explosion, assuming a final ideal gas distribution, or (less frequently) an out-of-equilibrium distribution. In this work we do not want to replace the Cooper-Frye description, but rather clarify the ways of using it and how to choose the parameters of the distribution and, eventually, how to choose the form of the phase space distribution used in the Cooper-Frye formula. Moreover, the Cooper-Frye formula is used in connection with the freeze-out problem, while the discussion of transition between different stages of the collision is applicable to other transitions also. More recently, hadronization and molecular dynamics models have been matched to the end of a fluid dynamical stage to describe hadronization and freeze-out. The stages of the model description can be matched to each other on space-time hypersurfaces (just like through the frequently used freeze-out hypersurface). This work presents a generalized description of how to match the stages of the description of a reaction to each other, extending the methodology used at freeze-out, in simple covariant form which is easily applicable in its simplest version for most applications.|
|Note:||Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevC.81.064910|
|It is part of:||Physical Review C, 2010, vol. 81, p. 064910-1-064910-8|
|Appears in Collections:||Articles publicats en revistes (Física Quàntica i Astrofísica)|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.