Tamás Csorgo | Hungarian National Science Foundation - Hungary

• Grant number: 06/03709-7
• Support Opportunities: Research Grants - Visiting Researcher Grant - International
• Start date: August 14, 2006
• End date: September 21, 2006
• Field of knowledge: Physical Sciences and Mathematics - Physics - Nuclear Physics
• Principal Investigator: Sandra dos Santos Padula
• Grantee: Sandra dos Santos Padula
• Visiting researcher: Tamás Csorgo
• Visiting researcher institution: Hungarian Scientific Research Fund, Hungary
• Host Institution: Instituto de Física Teórica (IFT). Universidade Estadual Paulista (UNESP). Campus de São Paulo. São Paulo , SP, Brazil

Abstract

Research proposal for Tamás Csörgö’s visit. Photon Back-to-Back Correlations as signal of early thermalization in relativistic heavy ion collisions and search for new exact solutions of Relativistic Hydrodynamics. Previously, the scientific collaboration between a team of scientists at IFT-Unesp (Sandra S. Padula, G. Krein, P. K. Panda), IF-USP (Y. Hama), and T. Csorgo of MTA KFKI RMKI, Budapest, Hungary, resulted in seminal papers on the application of squeezed quantum states to back-to-back correlations of bosons, as well as fermions in the hydrodynamically expanding medium relevant for heavy ion collisions. In recent discussions with D. Kharzeev, from Brookhaven National Laboratory, and Prof. R. Glauber, from Harvard University, Nobel Laureate of 2005, T. Csorgo agreed to extend these investigations to back-to-back correlations of photons. The major motivation for such a study is to search for a possible early thermalization in high energy heavy ion collisions, with the help of back-to-back correlations of photons. Consequently, this will be one of the major goals of the current visit. These above quantum-optical, quantum-statistical correlations are linked to a hydrodynamical background that, in relativistic heavy ion collisions at RHIC, corresponds to the perfect fluid created in Au+Au collisions at those energies. A previous collaboration of Y. Hama and F. Grassi, from USP, T. Kodama, from UFRJ, as well as T. Csorgo, resulted into a number of new exact solutions of relativistic hydrodynamics in 1+1 dimensional, 1+3 dimensional axially symmetric, and 1+3 dimensional ellipsoidally symmetric expansions. More recently, the group of T. Csorgo in Budapest, Hungary found a new family of exact solutions of relativistic hydrodynamics in 1+1 dimensional and 1+3 dimensional spherically symmetric case. The other part of the current project will be to explore how the initial acceleration modifies the Hanbury Brown & Twiss radius parameters in heavy ion collisions, and also to search for ellipsoidally symmetric generalizations of these new exact solutions of relativistic hydrodynamics. The visit we are proposing if of about 5 weeks. Its main purpose is to be a continuation of this well-established joint research program, which has already resulted in 11 papers and conference contributions. During his stay, T. Csorgo will also participate in the ISMD 2006, of which he is a convener. After that, he will also take active part in the WPCF 2006, to be held at Instituto de Fisica Teorica - Unesp, of which he is also an organizer, together with Sandra S. Padula (chair), Gastao Krein, Frederique Grassi and Otavio Socolowski. Special working sessions are planned at this workshop, in which a few topics of current research interest will be discussed and developed, which could be finished after the end of the meeting. Prof. T. Csorgo will have an important role in these activities. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

M. CSANÁD; T. CSÖRGO; M. NAGY. Anomalous diffusion of pions at RHIC. Brazilian Journal of Physics, v. 37, p. 1002-1013, 2007-09-00. (06/03709-7)