Physics
Scientific paper
Jan 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975phrvd..11..233c&link_type=abstract
Physical Review D - Particles and Fields, 3rd Series, vol. 11, Jan. 15, 1975, p. 233-244.
Physics
9
Astronomical Models, Hydrodynamics, Matter (Physics), Neutron Stars, Particle Collisions, Pions, Crab Nebula, Elementary Particle Interactions, Positron Annihilation, Pulsars, Viscous Flow
Scientific paper
The properties of the pion-pion collision in the GeV region are examined in order to provide insights into the behavior of matter at densities greater than 100 Teragrams per cu cm. The predictions based on the Landau model are used to decide upon the value for the speed of sound in the expression pressure equals c(s) squared times the energy density, where c(s) is the speed of sound expressed in units of c. Several pion-pion Lagrangians are analyzed for their predictions on the value of c(s) squared. The fundamental assumption of the Landau model, namely, the laminar nature of the flow, is investigated. It is found that the hadronic matter can become turbulent in the later stages of evolution when Reynolds number of about 4,000 is reached, which gives rise to the possibility of identifying the observed tendency of the pion gas to cluster with the eddies that characterize any turbulent flow.
Canuto Vittorio
Lodenquai J.
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