Rolf Hagedorn
Rolf Hagedorn (born July 20, 1919 in Barmen ; † March 9, 2003 in Geneva ) was a German theoretical physicist.
Hagedorn graduated from high school in Wuppertal-Barmen in 1937 and was with the Air Force in North Africa during World War II. As a US prisoner of war, he came to Tennessee in 1943 , where he temporarily taught physics at a high school. In 1946 he was released from captivity.
He then studied physics at the University of Göttingen . There he wrote his diploma thesis on the Lamb Shift in 1950 and received his doctorate in 1952 under Richard Becker on a topic of solid-state physics (statistical model of barium titanate). Hagedorn was a theoretician at CERN very early in 1954 (with a letter of recommendation from Werner Heisenberg , who was one of his teachers in Göttingen), in the accelerator theory group in Geneva for the planned synchrotron 'Proton Synchrotron' , which was launched in 1952 in the USA developed principle of strong focus should work. He stayed there for the remainder of his career and was Senior Physicist when he retired in 1984. Even after that, he continued to work at CERN, especially on heavy ion collisions at high energies and the quark-gluon plasma that was created .
At CERN he first dealt with particle accelerator physics in the 1950s and later with the statistical theory of meson production in hadron collisions (using computers from the TH Darmstadt and CERN as early as the late 1950s for his calculations). In this context he introduced the hawthorn temperature in the 1960s, which corresponds to the deconfinement temperature (a kind of "melting point" for hadrons) and also in another context (generally when the density of states increases exponentially with the energy, the hawthorn temperature then the temperature at which the partition function diverges) is important, e.g. B. in string theory . In the same work in 1965 he developed the statistical bootstrap model (also developed independently by Steven Frautschi ). Hagedorn was also known at CERN for his lectures and various yellow reports (review articles). He also developed interactive software for computer algebra (Sigma) at CERN.
Fonts
- Relativistic kinematics - a guide to kinematic problems in high energy physics, Benjamin, Reading / Massachusetts 1963, 1973
- Introduction to field theory and dispersion relations, Macmillan 1964
- Selected topics in Scattering theory, Geneva 1962
- with Masud Chaichian: Selected topics in quantum mechanics: from angular momentum to supersymmetry, Bristol, Philadelphia, Institute of Physics (IOP) 1998
Web links
References
- ↑ Another theory group at CERN was first in Copenhagen and only after 1957 in Geneva
- ^ Work in Nuovo Cimento 1958, 1960
- ↑ Nuovo Cimento Supplementum, Vol. 3, 1965, pp. 147-186
| personal data | |
|---|---|
| SURNAME | Hawthorn, Rolf |
| BRIEF DESCRIPTION | German physicist |
| DATE OF BIRTH | July 20, 1919 |
| PLACE OF BIRTH | Barmen |
| DATE OF DEATH | March 9, 2003 |
| Place of death | Geneva |