Yogiro Hama

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Cs. Anderlik, L. P. Csernai, F. Grassi, W. Greiner, Y. Hama, T. Kodama, Zs. I. Lázár, V. K. Magas, and H. Stöcker Section for Theoretical Physics, Department of Physics, University of Bergen, Allegaten 55, 5007 Bergen, Norway Institut für Theoretische Physik, Universität Frankfurt, Robert-Mayer-Strasse 8-10, D-60054 Frankfurt am Main, Germany KFKI Research(More)
First applications of relativistic hydrodynamics to the process of multiparticle production in high-energy hadronic collisions can be found in the works of Fermi and Landau in the early 1950’s [1,2]. Recently, extensive studies of the relativistic motion of fluids have been done with respect to the analysis of relativistic heavy-ion collision processes(More)
Hydrodynamic descriptions of high energy hadronic and nuclear collisions have a rather long history [1]. Although, from theoretical point of view, it is not a trivial matter to justify their validity, they have been successful in reproducing certain features of these processes, such as the energy dependence of the average multiplicity and the(More)
A complete history of relativistic hydrodynamics is yet to be written. Some partial accounts can be found in [1, 2]. Here, I just want to remember some seminal works which started this field, which might be called hydrodynamics applied to multiparticle production in high energy hadronic collisions. In his pioneering work of 1953 [3] Landau developed several(More)
In the late 1990’s, Back-to-Back Correlations (BBC) of boson-antiboson pairs were predict to exist if the particles masses were modified in the hot and dense medium[ 1], expected to be formed in high energy nucleus-nucleus collisions. The BBC are related to in-medium mass-modification and squeezing of the quanta involved. Not much longer after that, it was(More)
The effect of the continuous emission hypothesis on the two-pion Bose-Einstein correlation function is discussed and compared with the corresponding results based on the usual freeze-out. Sizable differences in the correlation function appear in these different descriptions of the decoupling process. This means that, when extracting properties of the hot(More)
M. Gaździcki, M. I. Gorenstein, F. Grassi, Y. Hama, T. Kodama, and O. Socolowski Jr. a Institut für Kernphysik, Universität Frankfurt, Germany b Bogolyubov Institute for Theoretical Physics, Kiev, Ukraine c Instituto de Fı́sica, Universidade de São Paulo, CP 66318, São Paulo, 05315-970, SP, Brazil d Instituto de Fı́sica, Universidade Federal do Rio de(More)
Hydrodynamics has many applications: formation and propagation of waves, wheather forecast, lift on airplane wing, black hole or dense stellar object collapse, primordial universe expansion, etc. How and why is hydrodynamics used in our field, the physics of relativistic hadronic or nuclear collisions? It was predicted in the mid-seventies, that a new state(More)
Hydrodynamics is usually adequate to describe the collective flow phenomena in macroscopic systems where thermodynamical relations are valid locally. Surprisingly enough, sometimes the hydrodynamical description is also useful as a model to describe the collective phenomena in microscopic and semi-microscopic systems. In fact, the collective flow behavior(More)
Hydrodynamics is one of the main tools for studying the collective flow in high-energy nuclear collisions. Here, we shall examine some of the main ingredients of such a description and see how likely more realistic treatment of these elements may affect some of the observable quantities. The main components of any hydrodynamic model are the initial(More)