Freeze-out from classical and continuous systems

Csaba Anderlik

Subatomic theory progress report

Bergen, September 2002

Principal Investigators:

Subatomic theory progress report

Bergen, September 2002

L. P. Csernai UiB

T. Engeland UiO

M. Hjort-Jensen UiO

E. Osnes UiO

J. S. Vaagen UiB

Doctoral students:

Subatomic theory progress report

Bergen, September 2002

Imante Raskinyte UiB, SLU 1998-present

Karolis Tamosiunas UiB, SLU 2002-

Maxim P. Kartamychev UiB/UiO, SLU 2001-present

Gaute Hagen UiB/UiO, NFR 2001-present

Agnes Nyiri UiB, NFR 2002-

Elise BergliUiO, NFR 2002-

Master of Science students:

Subatomic theory progress report

Bergen, September 2002

Eivind Brodal UiO, 2001-

Eirik Ovrun UiO, 2001-

Simen Kvaal UiO, 2002-

Mateusz Marek Røstad UiO, 2002-

Victoria Popsueva UiO, 2002-

Simen Sommerfelt Reine UiO, 2002-

Jon Kristian Nilsen UiO, 2002-

Andreas Sæbjørnsen UiO, 2002-

Subatomic theory progress report

Bergen, September 2002

Knut Bjørkli NTNU, 2001-

Ronny Kjelsberg NTNU, 2001-

Ann Cecilie Guldbransen UiB, 2000-

Olav Lilleskare UiB, 2001-

Øyvind Heggo Hansen UiB, 2000-

Andrea Anderlik UiB, 2000-

Etele Molnar UiB, 2002-

Alumni:

Subatomic theory progress report

Bergen, September 2002

F. V. De Blasio UiO, EU-MC 1998-1999, postdoc

Østein Elgarøy UiO, 1999 Dr. Scient

Lars Engvik UiO, 1999 Dr. Scient

Zsolt Lazar UiB, SLU, 1999 Dr. Scient

Anne Holt UiO, priv, 1999 Dr. Scient

Csaba Anderlik UiB, SLU, 2001 Dr. Scient

Volodymyr Magas UiB, SLU, 2001 Dr. Scient

Henning Heiberg-Andersen UiB, 2002 Dr. Scient

Dmitriy Gridnev UiB, SLU, 2001 Dr. Scient

Subatomic theory progress report

Bergen, September 2002

Giedre Sapragonaite UiB, SLU, 2002 Dr. Scient

Remi S. Aagersborg UiB, 2002 Cand. Scient

Karolis Tamosiunas UiB, SLU, 2002 Cand. Scient

Agnes Nyiri UiB, SLU, 2002 Cand. Scient

Gaute Hagen UiB, 2001 Cand. Scient

Subatomic theory progress report

Bergen, September 2002

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M. Sc. Deg.Ph. D. Deg.Ph. D Stud.M. Sc. Deg.M. Sc. Stud.

Subatomic theory progress report

Bergen, September 2002

Research Topics

• Heavy Ion Physics– Initial condition

– Nuclear flow

– Freeze-out

• Radioactive Nuclear Beams

• Nuclear Structure

• Neural Networks

• Astro/Particle Physics

Subatomic theory progress report

Bergen, September 2002

Research Topics:Radioactive Nuclear Beams

Subatomic theory progress report

Bergen, September 2002

Nuclear Structure

• Importance – Exotic nuclei far from the valley of beta stability

– Nuclear astrophysics

• Development of many-body techniques for the nuclear shell model

• Close collaboration with several experiments:– CERN (Isolde), GSI (Germany), Lund (Sweden), NBI (Denmark),

Surrey (UK), etc.

• Studies of the thermodinamical properties of finite nuclei, collaboration with Oslo cyclotron laboratory

• Properties of dense matter

Subatomic theory progress report

Bergen, September 2002

Freeze-out

• Describes the final stages of heavy-ion collisions:– all interaction cease in the systems

• Different theoretical models have been hired:– Kinetic models

– Field theoretical approach

Subatomic theory progress report

Bergen, September 2002

Freeze-out: kinetic approach

• Express macroscopic measurables using the microscopic properties of the system

• Important issues:» Timelike, spacelike freeze-out surfaces

» Conservation laws

» Coooper-Frye formula

• Our models:» cut Juttner distribution

» idealized model with drain term

» freeze-out distribution with rescattering

» four volume emission model

Subatomic theory progress report

Bergen, September 2002

Freeze-out: field theory approach

• Linear sigma model

Subatomic theory progress report

Bergen, September 2002

Subatomic theory progress report

Bergen, September 2002

Subatomic theory progress report

Bergen, September 2002

Subatomic theory progress report

Bergen, September 2002

Subatomic theory progress report

Bergen, September 2002